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2492 lines
65 KiB
2492 lines
65 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
#include <linux/ceph/ceph_debug.h> |
|
#include <linux/ceph/striper.h> |
|
|
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#include <linux/module.h> |
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#include <linux/sched.h> |
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#include <linux/slab.h> |
|
#include <linux/file.h> |
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#include <linux/mount.h> |
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#include <linux/namei.h> |
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#include <linux/writeback.h> |
|
#include <linux/falloc.h> |
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#include <linux/iversion.h> |
|
#include <linux/ktime.h> |
|
|
|
#include "super.h" |
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#include "mds_client.h" |
|
#include "cache.h" |
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#include "io.h" |
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#include "metric.h" |
|
|
|
static __le32 ceph_flags_sys2wire(u32 flags) |
|
{ |
|
u32 wire_flags = 0; |
|
|
|
switch (flags & O_ACCMODE) { |
|
case O_RDONLY: |
|
wire_flags |= CEPH_O_RDONLY; |
|
break; |
|
case O_WRONLY: |
|
wire_flags |= CEPH_O_WRONLY; |
|
break; |
|
case O_RDWR: |
|
wire_flags |= CEPH_O_RDWR; |
|
break; |
|
} |
|
|
|
flags &= ~O_ACCMODE; |
|
|
|
#define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; } |
|
|
|
ceph_sys2wire(O_CREAT); |
|
ceph_sys2wire(O_EXCL); |
|
ceph_sys2wire(O_TRUNC); |
|
ceph_sys2wire(O_DIRECTORY); |
|
ceph_sys2wire(O_NOFOLLOW); |
|
|
|
#undef ceph_sys2wire |
|
|
|
if (flags) |
|
dout("unused open flags: %x\n", flags); |
|
|
|
return cpu_to_le32(wire_flags); |
|
} |
|
|
|
/* |
|
* Ceph file operations |
|
* |
|
* Implement basic open/close functionality, and implement |
|
* read/write. |
|
* |
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* We implement three modes of file I/O: |
|
* - buffered uses the generic_file_aio_{read,write} helpers |
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* |
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* - synchronous is used when there is multi-client read/write |
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* sharing, avoids the page cache, and synchronously waits for an |
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* ack from the OSD. |
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* |
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* - direct io takes the variant of the sync path that references |
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* user pages directly. |
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* |
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* fsync() flushes and waits on dirty pages, but just queues metadata |
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* for writeback: since the MDS can recover size and mtime there is no |
|
* need to wait for MDS acknowledgement. |
|
*/ |
|
|
|
/* |
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* How many pages to get in one call to iov_iter_get_pages(). This |
|
* determines the size of the on-stack array used as a buffer. |
|
*/ |
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#define ITER_GET_BVECS_PAGES 64 |
|
|
|
static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize, |
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struct bio_vec *bvecs) |
|
{ |
|
size_t size = 0; |
|
int bvec_idx = 0; |
|
|
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if (maxsize > iov_iter_count(iter)) |
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maxsize = iov_iter_count(iter); |
|
|
|
while (size < maxsize) { |
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struct page *pages[ITER_GET_BVECS_PAGES]; |
|
ssize_t bytes; |
|
size_t start; |
|
int idx = 0; |
|
|
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bytes = iov_iter_get_pages(iter, pages, maxsize - size, |
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ITER_GET_BVECS_PAGES, &start); |
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if (bytes < 0) |
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return size ?: bytes; |
|
|
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iov_iter_advance(iter, bytes); |
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size += bytes; |
|
|
|
for ( ; bytes; idx++, bvec_idx++) { |
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struct bio_vec bv = { |
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.bv_page = pages[idx], |
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.bv_len = min_t(int, bytes, PAGE_SIZE - start), |
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.bv_offset = start, |
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}; |
|
|
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bvecs[bvec_idx] = bv; |
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bytes -= bv.bv_len; |
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start = 0; |
|
} |
|
} |
|
|
|
return size; |
|
} |
|
|
|
/* |
|
* iov_iter_get_pages() only considers one iov_iter segment, no matter |
|
* what maxsize or maxpages are given. For ITER_BVEC that is a single |
|
* page. |
|
* |
|
* Attempt to get up to @maxsize bytes worth of pages from @iter. |
|
* Return the number of bytes in the created bio_vec array, or an error. |
|
*/ |
|
static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize, |
|
struct bio_vec **bvecs, int *num_bvecs) |
|
{ |
|
struct bio_vec *bv; |
|
size_t orig_count = iov_iter_count(iter); |
|
ssize_t bytes; |
|
int npages; |
|
|
|
iov_iter_truncate(iter, maxsize); |
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npages = iov_iter_npages(iter, INT_MAX); |
|
iov_iter_reexpand(iter, orig_count); |
|
|
|
/* |
|
* __iter_get_bvecs() may populate only part of the array -- zero it |
|
* out. |
|
*/ |
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bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO); |
|
if (!bv) |
|
return -ENOMEM; |
|
|
|
bytes = __iter_get_bvecs(iter, maxsize, bv); |
|
if (bytes < 0) { |
|
/* |
|
* No pages were pinned -- just free the array. |
|
*/ |
|
kvfree(bv); |
|
return bytes; |
|
} |
|
|
|
*bvecs = bv; |
|
*num_bvecs = npages; |
|
return bytes; |
|
} |
|
|
|
static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < num_bvecs; i++) { |
|
if (bvecs[i].bv_page) { |
|
if (should_dirty) |
|
set_page_dirty_lock(bvecs[i].bv_page); |
|
put_page(bvecs[i].bv_page); |
|
} |
|
} |
|
kvfree(bvecs); |
|
} |
|
|
|
/* |
|
* Prepare an open request. Preallocate ceph_cap to avoid an |
|
* inopportune ENOMEM later. |
|
*/ |
|
static struct ceph_mds_request * |
|
prepare_open_request(struct super_block *sb, int flags, int create_mode) |
|
{ |
|
struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); |
|
struct ceph_mds_request *req; |
|
int want_auth = USE_ANY_MDS; |
|
int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN; |
|
|
|
if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC)) |
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want_auth = USE_AUTH_MDS; |
|
|
|
req = ceph_mdsc_create_request(mdsc, op, want_auth); |
|
if (IS_ERR(req)) |
|
goto out; |
|
req->r_fmode = ceph_flags_to_mode(flags); |
|
req->r_args.open.flags = ceph_flags_sys2wire(flags); |
|
req->r_args.open.mode = cpu_to_le32(create_mode); |
|
out: |
|
return req; |
|
} |
|
|
|
static int ceph_init_file_info(struct inode *inode, struct file *file, |
|
int fmode, bool isdir) |
|
{ |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_file_info *fi; |
|
|
|
dout("%s %p %p 0%o (%s)\n", __func__, inode, file, |
|
inode->i_mode, isdir ? "dir" : "regular"); |
|
BUG_ON(inode->i_fop->release != ceph_release); |
|
|
|
if (isdir) { |
|
struct ceph_dir_file_info *dfi = |
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kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); |
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if (!dfi) |
|
return -ENOMEM; |
|
|
|
file->private_data = dfi; |
|
fi = &dfi->file_info; |
|
dfi->next_offset = 2; |
|
dfi->readdir_cache_idx = -1; |
|
} else { |
|
fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); |
|
if (!fi) |
|
return -ENOMEM; |
|
|
|
file->private_data = fi; |
|
} |
|
|
|
ceph_get_fmode(ci, fmode, 1); |
|
fi->fmode = fmode; |
|
|
|
spin_lock_init(&fi->rw_contexts_lock); |
|
INIT_LIST_HEAD(&fi->rw_contexts); |
|
fi->meta_err = errseq_sample(&ci->i_meta_err); |
|
fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* initialize private struct file data. |
|
* if we fail, clean up by dropping fmode reference on the ceph_inode |
|
*/ |
|
static int ceph_init_file(struct inode *inode, struct file *file, int fmode) |
|
{ |
|
int ret = 0; |
|
|
|
switch (inode->i_mode & S_IFMT) { |
|
case S_IFREG: |
|
ceph_fscache_register_inode_cookie(inode); |
|
ceph_fscache_file_set_cookie(inode, file); |
|
fallthrough; |
|
case S_IFDIR: |
|
ret = ceph_init_file_info(inode, file, fmode, |
|
S_ISDIR(inode->i_mode)); |
|
break; |
|
|
|
case S_IFLNK: |
|
dout("init_file %p %p 0%o (symlink)\n", inode, file, |
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inode->i_mode); |
|
break; |
|
|
|
default: |
|
dout("init_file %p %p 0%o (special)\n", inode, file, |
|
inode->i_mode); |
|
/* |
|
* we need to drop the open ref now, since we don't |
|
* have .release set to ceph_release. |
|
*/ |
|
BUG_ON(inode->i_fop->release == ceph_release); |
|
|
|
/* call the proper open fop */ |
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ret = inode->i_fop->open(inode, file); |
|
} |
|
return ret; |
|
} |
|
|
|
/* |
|
* try renew caps after session gets killed. |
|
*/ |
|
int ceph_renew_caps(struct inode *inode, int fmode) |
|
{ |
|
struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
|
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) && |
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(!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) { |
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int issued = __ceph_caps_issued(ci, NULL); |
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spin_unlock(&ci->i_ceph_lock); |
|
dout("renew caps %p want %s issued %s updating mds_wanted\n", |
|
inode, ceph_cap_string(wanted), ceph_cap_string(issued)); |
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ceph_check_caps(ci, 0, NULL); |
|
return 0; |
|
} |
|
spin_unlock(&ci->i_ceph_lock); |
|
|
|
flags = 0; |
|
if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR)) |
|
flags = O_RDWR; |
|
else if (wanted & CEPH_CAP_FILE_RD) |
|
flags = O_RDONLY; |
|
else if (wanted & CEPH_CAP_FILE_WR) |
|
flags = O_WRONLY; |
|
#ifdef O_LAZY |
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if (wanted & CEPH_CAP_FILE_LAZYIO) |
|
flags |= O_LAZY; |
|
#endif |
|
|
|
req = prepare_open_request(inode->i_sb, flags, 0); |
|
if (IS_ERR(req)) { |
|
err = PTR_ERR(req); |
|
goto out; |
|
} |
|
|
|
req->r_inode = inode; |
|
ihold(inode); |
|
req->r_num_caps = 1; |
|
|
|
err = ceph_mdsc_do_request(mdsc, NULL, req); |
|
ceph_mdsc_put_request(req); |
|
out: |
|
dout("renew caps %p open result=%d\n", inode, err); |
|
return err < 0 ? err : 0; |
|
} |
|
|
|
/* |
|
* If we already have the requisite capabilities, we can satisfy |
|
* the open request locally (no need to request new caps from the |
|
* MDS). We do, however, need to inform the MDS (asynchronously) |
|
* if our wanted caps set expands. |
|
*/ |
|
int ceph_open(struct inode *inode, struct file *file) |
|
{ |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
|
struct ceph_mds_client *mdsc = fsc->mdsc; |
|
struct ceph_mds_request *req; |
|
struct ceph_file_info *fi = file->private_data; |
|
int err; |
|
int flags, fmode, wanted; |
|
|
|
if (fi) { |
|
dout("open file %p is already opened\n", file); |
|
return 0; |
|
} |
|
|
|
/* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ |
|
flags = file->f_flags & ~(O_CREAT|O_EXCL); |
|
if (S_ISDIR(inode->i_mode)) |
|
flags = O_DIRECTORY; /* mds likes to know */ |
|
|
|
dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode, |
|
ceph_vinop(inode), file, flags, file->f_flags); |
|
fmode = ceph_flags_to_mode(flags); |
|
wanted = ceph_caps_for_mode(fmode); |
|
|
|
/* snapped files are read-only */ |
|
if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE)) |
|
return -EROFS; |
|
|
|
/* trivially open snapdir */ |
|
if (ceph_snap(inode) == CEPH_SNAPDIR) { |
|
return ceph_init_file(inode, file, fmode); |
|
} |
|
|
|
/* |
|
* No need to block if we have caps on the auth MDS (for |
|
* write) or any MDS (for read). Update wanted set |
|
* asynchronously. |
|
*/ |
|
spin_lock(&ci->i_ceph_lock); |
|
if (__ceph_is_any_real_caps(ci) && |
|
(((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { |
|
int mds_wanted = __ceph_caps_mds_wanted(ci, true); |
|
int issued = __ceph_caps_issued(ci, NULL); |
|
|
|
dout("open %p fmode %d want %s issued %s using existing\n", |
|
inode, fmode, ceph_cap_string(wanted), |
|
ceph_cap_string(issued)); |
|
__ceph_touch_fmode(ci, mdsc, fmode); |
|
spin_unlock(&ci->i_ceph_lock); |
|
|
|
/* adjust wanted? */ |
|
if ((issued & wanted) != wanted && |
|
(mds_wanted & wanted) != wanted && |
|
ceph_snap(inode) != CEPH_SNAPDIR) |
|
ceph_check_caps(ci, 0, NULL); |
|
|
|
return ceph_init_file(inode, file, fmode); |
|
} else if (ceph_snap(inode) != CEPH_NOSNAP && |
|
(ci->i_snap_caps & wanted) == wanted) { |
|
__ceph_touch_fmode(ci, mdsc, fmode); |
|
spin_unlock(&ci->i_ceph_lock); |
|
return ceph_init_file(inode, file, fmode); |
|
} |
|
|
|
spin_unlock(&ci->i_ceph_lock); |
|
|
|
dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted)); |
|
req = prepare_open_request(inode->i_sb, flags, 0); |
|
if (IS_ERR(req)) { |
|
err = PTR_ERR(req); |
|
goto out; |
|
} |
|
req->r_inode = inode; |
|
ihold(inode); |
|
|
|
req->r_num_caps = 1; |
|
err = ceph_mdsc_do_request(mdsc, NULL, req); |
|
if (!err) |
|
err = ceph_init_file(inode, file, req->r_fmode); |
|
ceph_mdsc_put_request(req); |
|
dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode)); |
|
out: |
|
return err; |
|
} |
|
|
|
/* Clone the layout from a synchronous create, if the dir now has Dc caps */ |
|
static void |
|
cache_file_layout(struct inode *dst, struct inode *src) |
|
{ |
|
struct ceph_inode_info *cdst = ceph_inode(dst); |
|
struct ceph_inode_info *csrc = ceph_inode(src); |
|
|
|
spin_lock(&cdst->i_ceph_lock); |
|
if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) && |
|
!ceph_file_layout_is_valid(&cdst->i_cached_layout)) { |
|
memcpy(&cdst->i_cached_layout, &csrc->i_layout, |
|
sizeof(cdst->i_cached_layout)); |
|
rcu_assign_pointer(cdst->i_cached_layout.pool_ns, |
|
ceph_try_get_string(csrc->i_layout.pool_ns)); |
|
} |
|
spin_unlock(&cdst->i_ceph_lock); |
|
} |
|
|
|
/* |
|
* Try to set up an async create. We need caps, a file layout, and inode number, |
|
* and either a lease on the dentry or complete dir info. If any of those |
|
* criteria are not satisfied, then return false and the caller can go |
|
* synchronous. |
|
*/ |
|
static int try_prep_async_create(struct inode *dir, struct dentry *dentry, |
|
struct ceph_file_layout *lo, u64 *pino) |
|
{ |
|
struct ceph_inode_info *ci = ceph_inode(dir); |
|
struct ceph_dentry_info *di = ceph_dentry(dentry); |
|
int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE; |
|
u64 ino; |
|
|
|
spin_lock(&ci->i_ceph_lock); |
|
/* No auth cap means no chance for Dc caps */ |
|
if (!ci->i_auth_cap) |
|
goto no_async; |
|
|
|
/* Any delegated inos? */ |
|
if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos)) |
|
goto no_async; |
|
|
|
if (!ceph_file_layout_is_valid(&ci->i_cached_layout)) |
|
goto no_async; |
|
|
|
if ((__ceph_caps_issued(ci, NULL) & want) != want) |
|
goto no_async; |
|
|
|
if (d_in_lookup(dentry)) { |
|
if (!__ceph_dir_is_complete(ci)) |
|
goto no_async; |
|
spin_lock(&dentry->d_lock); |
|
di->lease_shared_gen = atomic_read(&ci->i_shared_gen); |
|
spin_unlock(&dentry->d_lock); |
|
} else if (atomic_read(&ci->i_shared_gen) != |
|
READ_ONCE(di->lease_shared_gen)) { |
|
goto no_async; |
|
} |
|
|
|
ino = ceph_get_deleg_ino(ci->i_auth_cap->session); |
|
if (!ino) |
|
goto no_async; |
|
|
|
*pino = ino; |
|
ceph_take_cap_refs(ci, want, false); |
|
memcpy(lo, &ci->i_cached_layout, sizeof(*lo)); |
|
rcu_assign_pointer(lo->pool_ns, |
|
ceph_try_get_string(ci->i_cached_layout.pool_ns)); |
|
got = want; |
|
no_async: |
|
spin_unlock(&ci->i_ceph_lock); |
|
return got; |
|
} |
|
|
|
static void restore_deleg_ino(struct inode *dir, u64 ino) |
|
{ |
|
struct ceph_inode_info *ci = ceph_inode(dir); |
|
struct ceph_mds_session *s = NULL; |
|
|
|
spin_lock(&ci->i_ceph_lock); |
|
if (ci->i_auth_cap) |
|
s = ceph_get_mds_session(ci->i_auth_cap->session); |
|
spin_unlock(&ci->i_ceph_lock); |
|
if (s) { |
|
int err = ceph_restore_deleg_ino(s, ino); |
|
if (err) |
|
pr_warn("ceph: unable to restore delegated ino 0x%llx to session: %d\n", |
|
ino, err); |
|
ceph_put_mds_session(s); |
|
} |
|
} |
|
|
|
static void ceph_async_create_cb(struct ceph_mds_client *mdsc, |
|
struct ceph_mds_request *req) |
|
{ |
|
int result = req->r_err ? req->r_err : |
|
le32_to_cpu(req->r_reply_info.head->result); |
|
|
|
if (result == -EJUKEBOX) |
|
goto out; |
|
|
|
mapping_set_error(req->r_parent->i_mapping, result); |
|
|
|
if (result) { |
|
struct dentry *dentry = req->r_dentry; |
|
int pathlen = 0; |
|
u64 base = 0; |
|
char *path = ceph_mdsc_build_path(req->r_dentry, &pathlen, |
|
&base, 0); |
|
|
|
ceph_dir_clear_complete(req->r_parent); |
|
if (!d_unhashed(dentry)) |
|
d_drop(dentry); |
|
|
|
/* FIXME: start returning I/O errors on all accesses? */ |
|
pr_warn("ceph: async create failure path=(%llx)%s result=%d!\n", |
|
base, IS_ERR(path) ? "<<bad>>" : path, result); |
|
ceph_mdsc_free_path(path, pathlen); |
|
} |
|
|
|
if (req->r_target_inode) { |
|
struct ceph_inode_info *ci = ceph_inode(req->r_target_inode); |
|
u64 ino = ceph_vino(req->r_target_inode).ino; |
|
|
|
if (req->r_deleg_ino != ino) |
|
pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n", |
|
__func__, req->r_err, req->r_deleg_ino, ino); |
|
mapping_set_error(req->r_target_inode->i_mapping, result); |
|
|
|
spin_lock(&ci->i_ceph_lock); |
|
if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) { |
|
ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE; |
|
wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT); |
|
} |
|
ceph_kick_flushing_inode_caps(req->r_session, ci); |
|
spin_unlock(&ci->i_ceph_lock); |
|
} else { |
|
pr_warn("%s: no req->r_target_inode for 0x%llx\n", __func__, |
|
req->r_deleg_ino); |
|
} |
|
out: |
|
ceph_mdsc_release_dir_caps(req); |
|
} |
|
|
|
static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry, |
|
struct file *file, umode_t mode, |
|
struct ceph_mds_request *req, |
|
struct ceph_acl_sec_ctx *as_ctx, |
|
struct ceph_file_layout *lo) |
|
{ |
|
int ret; |
|
char xattr_buf[4]; |
|
struct ceph_mds_reply_inode in = { }; |
|
struct ceph_mds_reply_info_in iinfo = { .in = &in }; |
|
struct ceph_inode_info *ci = ceph_inode(dir); |
|
struct inode *inode; |
|
struct timespec64 now; |
|
struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb); |
|
struct ceph_vino vino = { .ino = req->r_deleg_ino, |
|
.snap = CEPH_NOSNAP }; |
|
|
|
ktime_get_real_ts64(&now); |
|
|
|
inode = ceph_get_inode(dentry->d_sb, vino); |
|
if (IS_ERR(inode)) |
|
return PTR_ERR(inode); |
|
|
|
iinfo.inline_version = CEPH_INLINE_NONE; |
|
iinfo.change_attr = 1; |
|
ceph_encode_timespec64(&iinfo.btime, &now); |
|
|
|
iinfo.xattr_len = ARRAY_SIZE(xattr_buf); |
|
iinfo.xattr_data = xattr_buf; |
|
memset(iinfo.xattr_data, 0, iinfo.xattr_len); |
|
|
|
in.ino = cpu_to_le64(vino.ino); |
|
in.snapid = cpu_to_le64(CEPH_NOSNAP); |
|
in.version = cpu_to_le64(1); // ??? |
|
in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE); |
|
in.cap.cap_id = cpu_to_le64(1); |
|
in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino); |
|
in.cap.flags = CEPH_CAP_FLAG_AUTH; |
|
in.ctime = in.mtime = in.atime = iinfo.btime; |
|
in.mode = cpu_to_le32((u32)mode); |
|
in.truncate_seq = cpu_to_le32(1); |
|
in.truncate_size = cpu_to_le64(-1ULL); |
|
in.xattr_version = cpu_to_le64(1); |
|
in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid())); |
|
in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_mode & S_ISGID ? |
|
dir->i_gid : current_fsgid())); |
|
in.nlink = cpu_to_le32(1); |
|
in.max_size = cpu_to_le64(lo->stripe_unit); |
|
|
|
ceph_file_layout_to_legacy(lo, &in.layout); |
|
|
|
down_read(&mdsc->snap_rwsem); |
|
ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session, |
|
req->r_fmode, NULL); |
|
up_read(&mdsc->snap_rwsem); |
|
if (ret) { |
|
dout("%s failed to fill inode: %d\n", __func__, ret); |
|
ceph_dir_clear_complete(dir); |
|
if (!d_unhashed(dentry)) |
|
d_drop(dentry); |
|
if (inode->i_state & I_NEW) |
|
discard_new_inode(inode); |
|
} else { |
|
struct dentry *dn; |
|
|
|
dout("%s d_adding new inode 0x%llx to 0x%llx/%s\n", __func__, |
|
vino.ino, ceph_ino(dir), dentry->d_name.name); |
|
ceph_dir_clear_ordered(dir); |
|
ceph_init_inode_acls(inode, as_ctx); |
|
if (inode->i_state & I_NEW) { |
|
/* |
|
* If it's not I_NEW, then someone created this before |
|
* we got here. Assume the server is aware of it at |
|
* that point and don't worry about setting |
|
* CEPH_I_ASYNC_CREATE. |
|
*/ |
|
ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE; |
|
unlock_new_inode(inode); |
|
} |
|
if (d_in_lookup(dentry) || d_really_is_negative(dentry)) { |
|
if (!d_unhashed(dentry)) |
|
d_drop(dentry); |
|
dn = d_splice_alias(inode, dentry); |
|
WARN_ON_ONCE(dn && dn != dentry); |
|
} |
|
file->f_mode |= FMODE_CREATED; |
|
ret = finish_open(file, dentry, ceph_open); |
|
} |
|
return ret; |
|
} |
|
|
|
/* |
|
* Do a lookup + open with a single request. If we get a non-existent |
|
* file or symlink, return 1 so the VFS can retry. |
|
*/ |
|
int ceph_atomic_open(struct inode *dir, struct dentry *dentry, |
|
struct file *file, unsigned flags, umode_t mode) |
|
{ |
|
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
|
struct ceph_mds_client *mdsc = fsc->mdsc; |
|
struct ceph_mds_request *req; |
|
struct dentry *dn; |
|
struct ceph_acl_sec_ctx as_ctx = {}; |
|
bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS); |
|
int mask; |
|
int err; |
|
|
|
dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n", |
|
dir, dentry, dentry, |
|
d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode); |
|
|
|
if (dentry->d_name.len > NAME_MAX) |
|
return -ENAMETOOLONG; |
|
|
|
if (flags & O_CREAT) { |
|
if (ceph_quota_is_max_files_exceeded(dir)) |
|
return -EDQUOT; |
|
err = ceph_pre_init_acls(dir, &mode, &as_ctx); |
|
if (err < 0) |
|
return err; |
|
err = ceph_security_init_secctx(dentry, mode, &as_ctx); |
|
if (err < 0) |
|
goto out_ctx; |
|
} else if (!d_in_lookup(dentry)) { |
|
/* If it's not being looked up, it's negative */ |
|
return -ENOENT; |
|
} |
|
retry: |
|
/* do the open */ |
|
req = prepare_open_request(dir->i_sb, flags, mode); |
|
if (IS_ERR(req)) { |
|
err = PTR_ERR(req); |
|
goto out_ctx; |
|
} |
|
req->r_dentry = dget(dentry); |
|
req->r_num_caps = 2; |
|
mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; |
|
if (ceph_security_xattr_wanted(dir)) |
|
mask |= CEPH_CAP_XATTR_SHARED; |
|
req->r_args.open.mask = cpu_to_le32(mask); |
|
req->r_parent = dir; |
|
ihold(dir); |
|
|
|
if (flags & O_CREAT) { |
|
struct ceph_file_layout lo; |
|
|
|
req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL; |
|
req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
|
if (as_ctx.pagelist) { |
|
req->r_pagelist = as_ctx.pagelist; |
|
as_ctx.pagelist = NULL; |
|
} |
|
if (try_async && |
|
(req->r_dir_caps = |
|
try_prep_async_create(dir, dentry, &lo, |
|
&req->r_deleg_ino))) { |
|
set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags); |
|
req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL); |
|
req->r_callback = ceph_async_create_cb; |
|
err = ceph_mdsc_submit_request(mdsc, dir, req); |
|
if (!err) { |
|
err = ceph_finish_async_create(dir, dentry, |
|
file, mode, req, |
|
&as_ctx, &lo); |
|
} else if (err == -EJUKEBOX) { |
|
restore_deleg_ino(dir, req->r_deleg_ino); |
|
ceph_mdsc_put_request(req); |
|
try_async = false; |
|
goto retry; |
|
} |
|
goto out_req; |
|
} |
|
} |
|
|
|
set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); |
|
err = ceph_mdsc_do_request(mdsc, |
|
(flags & (O_CREAT|O_TRUNC)) ? dir : NULL, |
|
req); |
|
if (err == -ENOENT) { |
|
dentry = ceph_handle_snapdir(req, dentry); |
|
if (IS_ERR(dentry)) { |
|
err = PTR_ERR(dentry); |
|
goto out_req; |
|
} |
|
err = 0; |
|
} |
|
|
|
if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry) |
|
err = ceph_handle_notrace_create(dir, dentry); |
|
|
|
if (d_in_lookup(dentry)) { |
|
dn = ceph_finish_lookup(req, dentry, err); |
|
if (IS_ERR(dn)) |
|
err = PTR_ERR(dn); |
|
} else { |
|
/* we were given a hashed negative dentry */ |
|
dn = NULL; |
|
} |
|
if (err) |
|
goto out_req; |
|
if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) { |
|
/* make vfs retry on splice, ENOENT, or symlink */ |
|
dout("atomic_open finish_no_open on dn %p\n", dn); |
|
err = finish_no_open(file, dn); |
|
} else { |
|
dout("atomic_open finish_open on dn %p\n", dn); |
|
if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { |
|
struct inode *newino = d_inode(dentry); |
|
|
|
cache_file_layout(dir, newino); |
|
ceph_init_inode_acls(newino, &as_ctx); |
|
file->f_mode |= FMODE_CREATED; |
|
} |
|
err = finish_open(file, dentry, ceph_open); |
|
} |
|
out_req: |
|
ceph_mdsc_put_request(req); |
|
out_ctx: |
|
ceph_release_acl_sec_ctx(&as_ctx); |
|
dout("atomic_open result=%d\n", err); |
|
return err; |
|
} |
|
|
|
int ceph_release(struct inode *inode, struct file *file) |
|
{ |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
|
|
if (S_ISDIR(inode->i_mode)) { |
|
struct ceph_dir_file_info *dfi = file->private_data; |
|
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, 1); |
|
|
|
if (dfi->last_readdir) |
|
ceph_mdsc_put_request(dfi->last_readdir); |
|
kfree(dfi->last_name); |
|
kfree(dfi->dir_info); |
|
kmem_cache_free(ceph_dir_file_cachep, dfi); |
|
} else { |
|
struct ceph_file_info *fi = file->private_data; |
|
dout("release inode %p regular file %p\n", inode, file); |
|
WARN_ON(!list_empty(&fi->rw_contexts)); |
|
|
|
ceph_put_fmode(ci, fi->fmode, 1); |
|
|
|
kmem_cache_free(ceph_file_cachep, fi); |
|
} |
|
|
|
/* wake up anyone waiting for caps on this inode */ |
|
wake_up_all(&ci->i_cap_wq); |
|
return 0; |
|
} |
|
|
|
enum { |
|
HAVE_RETRIED = 1, |
|
CHECK_EOF = 2, |
|
READ_INLINE = 3, |
|
}; |
|
|
|
/* |
|
* Completely synchronous read and write methods. Direct from __user |
|
* buffer to osd, or directly to user pages (if O_DIRECT). |
|
* |
|
* If the read spans object boundary, just do multiple reads. (That's not |
|
* atomic, but good enough for now.) |
|
* |
|
* If we get a short result from the OSD, check against i_size; we need to |
|
* only return a short read to the caller if we hit EOF. |
|
*/ |
|
static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, |
|
int *retry_op) |
|
{ |
|
struct file *file = iocb->ki_filp; |
|
struct inode *inode = file_inode(file); |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
|
struct ceph_osd_client *osdc = &fsc->client->osdc; |
|
ssize_t ret; |
|
u64 off = iocb->ki_pos; |
|
u64 len = iov_iter_count(to); |
|
|
|
dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len, |
|
(file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); |
|
|
|
if (!len) |
|
return 0; |
|
/* |
|
* flush any page cache pages in this range. this |
|
* will make concurrent normal and sync io slow, |
|
* but it will at least behave sensibly when they are |
|
* in sequence. |
|
*/ |
|
ret = filemap_write_and_wait_range(inode->i_mapping, |
|
off, off + len - 1); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = 0; |
|
while ((len = iov_iter_count(to)) > 0) { |
|
struct ceph_osd_request *req; |
|
struct page **pages; |
|
int num_pages; |
|
size_t page_off; |
|
u64 i_size; |
|
bool more; |
|
int idx; |
|
size_t left; |
|
|
|
req = ceph_osdc_new_request(osdc, &ci->i_layout, |
|
ci->i_vino, off, &len, 0, 1, |
|
CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, |
|
NULL, ci->i_truncate_seq, |
|
ci->i_truncate_size, false); |
|
if (IS_ERR(req)) { |
|
ret = PTR_ERR(req); |
|
break; |
|
} |
|
|
|
more = len < iov_iter_count(to); |
|
|
|
num_pages = calc_pages_for(off, len); |
|
page_off = off & ~PAGE_MASK; |
|
pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); |
|
if (IS_ERR(pages)) { |
|
ceph_osdc_put_request(req); |
|
ret = PTR_ERR(pages); |
|
break; |
|
} |
|
|
|
osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off, |
|
false, false); |
|
ret = ceph_osdc_start_request(osdc, req, false); |
|
if (!ret) |
|
ret = ceph_osdc_wait_request(osdc, req); |
|
|
|
ceph_update_read_metrics(&fsc->mdsc->metric, |
|
req->r_start_latency, |
|
req->r_end_latency, |
|
len, ret); |
|
|
|
ceph_osdc_put_request(req); |
|
|
|
i_size = i_size_read(inode); |
|
dout("sync_read %llu~%llu got %zd i_size %llu%s\n", |
|
off, len, ret, i_size, (more ? " MORE" : "")); |
|
|
|
if (ret == -ENOENT) |
|
ret = 0; |
|
if (ret >= 0 && ret < len && (off + ret < i_size)) { |
|
int zlen = min(len - ret, i_size - off - ret); |
|
int zoff = page_off + ret; |
|
dout("sync_read zero gap %llu~%llu\n", |
|
off + ret, off + ret + zlen); |
|
ceph_zero_page_vector_range(zoff, zlen, pages); |
|
ret += zlen; |
|
} |
|
|
|
idx = 0; |
|
left = ret > 0 ? ret : 0; |
|
while (left > 0) { |
|
size_t len, copied; |
|
page_off = off & ~PAGE_MASK; |
|
len = min_t(size_t, left, PAGE_SIZE - page_off); |
|
SetPageUptodate(pages[idx]); |
|
copied = copy_page_to_iter(pages[idx++], |
|
page_off, len, to); |
|
off += copied; |
|
left -= copied; |
|
if (copied < len) { |
|
ret = -EFAULT; |
|
break; |
|
} |
|
} |
|
ceph_release_page_vector(pages, num_pages); |
|
|
|
if (ret < 0) { |
|
if (ret == -EBLOCKLISTED) |
|
fsc->blocklisted = true; |
|
break; |
|
} |
|
|
|
if (off >= i_size || !more) |
|
break; |
|
} |
|
|
|
if (off > iocb->ki_pos) { |
|
if (ret >= 0 && |
|
iov_iter_count(to) > 0 && off >= i_size_read(inode)) |
|
*retry_op = CHECK_EOF; |
|
ret = off - iocb->ki_pos; |
|
iocb->ki_pos = off; |
|
} |
|
|
|
dout("sync_read result %zd retry_op %d\n", ret, *retry_op); |
|
return ret; |
|
} |
|
|
|
struct ceph_aio_request { |
|
struct kiocb *iocb; |
|
size_t total_len; |
|
bool write; |
|
bool should_dirty; |
|
int error; |
|
struct list_head osd_reqs; |
|
unsigned num_reqs; |
|
atomic_t pending_reqs; |
|
struct timespec64 mtime; |
|
struct ceph_cap_flush *prealloc_cf; |
|
}; |
|
|
|
struct ceph_aio_work { |
|
struct work_struct work; |
|
struct ceph_osd_request *req; |
|
}; |
|
|
|
static void ceph_aio_retry_work(struct work_struct *work); |
|
|
|
static void ceph_aio_complete(struct inode *inode, |
|
struct ceph_aio_request *aio_req) |
|
{ |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
int ret; |
|
|
|
if (!atomic_dec_and_test(&aio_req->pending_reqs)) |
|
return; |
|
|
|
if (aio_req->iocb->ki_flags & IOCB_DIRECT) |
|
inode_dio_end(inode); |
|
|
|
ret = aio_req->error; |
|
if (!ret) |
|
ret = aio_req->total_len; |
|
|
|
dout("ceph_aio_complete %p rc %d\n", inode, ret); |
|
|
|
if (ret >= 0 && aio_req->write) { |
|
int dirty; |
|
|
|
loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len; |
|
if (endoff > i_size_read(inode)) { |
|
if (ceph_inode_set_size(inode, endoff)) |
|
ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); |
|
} |
|
|
|
spin_lock(&ci->i_ceph_lock); |
|
ci->i_inline_version = CEPH_INLINE_NONE; |
|
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
|
&aio_req->prealloc_cf); |
|
spin_unlock(&ci->i_ceph_lock); |
|
if (dirty) |
|
__mark_inode_dirty(inode, dirty); |
|
|
|
} |
|
|
|
ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR : |
|
CEPH_CAP_FILE_RD)); |
|
|
|
aio_req->iocb->ki_complete(aio_req->iocb, ret, 0); |
|
|
|
ceph_free_cap_flush(aio_req->prealloc_cf); |
|
kfree(aio_req); |
|
} |
|
|
|
static void ceph_aio_complete_req(struct ceph_osd_request *req) |
|
{ |
|
int rc = req->r_result; |
|
struct inode *inode = req->r_inode; |
|
struct ceph_aio_request *aio_req = req->r_priv; |
|
struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); |
|
struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric; |
|
unsigned int len = osd_data->bvec_pos.iter.bi_size; |
|
|
|
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS); |
|
BUG_ON(!osd_data->num_bvecs); |
|
|
|
dout("ceph_aio_complete_req %p rc %d bytes %u\n", inode, rc, len); |
|
|
|
if (rc == -EOLDSNAPC) { |
|
struct ceph_aio_work *aio_work; |
|
BUG_ON(!aio_req->write); |
|
|
|
aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS); |
|
if (aio_work) { |
|
INIT_WORK(&aio_work->work, ceph_aio_retry_work); |
|
aio_work->req = req; |
|
queue_work(ceph_inode_to_client(inode)->inode_wq, |
|
&aio_work->work); |
|
return; |
|
} |
|
rc = -ENOMEM; |
|
} else if (!aio_req->write) { |
|
if (rc == -ENOENT) |
|
rc = 0; |
|
if (rc >= 0 && len > rc) { |
|
struct iov_iter i; |
|
int zlen = len - rc; |
|
|
|
/* |
|
* If read is satisfied by single OSD request, |
|
* it can pass EOF. Otherwise read is within |
|
* i_size. |
|
*/ |
|
if (aio_req->num_reqs == 1) { |
|
loff_t i_size = i_size_read(inode); |
|
loff_t endoff = aio_req->iocb->ki_pos + rc; |
|
if (endoff < i_size) |
|
zlen = min_t(size_t, zlen, |
|
i_size - endoff); |
|
aio_req->total_len = rc + zlen; |
|
} |
|
|
|
iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs, |
|
osd_data->num_bvecs, len); |
|
iov_iter_advance(&i, rc); |
|
iov_iter_zero(zlen, &i); |
|
} |
|
} |
|
|
|
/* r_start_latency == 0 means the request was not submitted */ |
|
if (req->r_start_latency) { |
|
if (aio_req->write) |
|
ceph_update_write_metrics(metric, req->r_start_latency, |
|
req->r_end_latency, len, rc); |
|
else |
|
ceph_update_read_metrics(metric, req->r_start_latency, |
|
req->r_end_latency, len, rc); |
|
} |
|
|
|
put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs, |
|
aio_req->should_dirty); |
|
ceph_osdc_put_request(req); |
|
|
|
if (rc < 0) |
|
cmpxchg(&aio_req->error, 0, rc); |
|
|
|
ceph_aio_complete(inode, aio_req); |
|
return; |
|
} |
|
|
|
static void ceph_aio_retry_work(struct work_struct *work) |
|
{ |
|
struct ceph_aio_work *aio_work = |
|
container_of(work, struct ceph_aio_work, work); |
|
struct ceph_osd_request *orig_req = aio_work->req; |
|
struct ceph_aio_request *aio_req = orig_req->r_priv; |
|
struct inode *inode = orig_req->r_inode; |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_snap_context *snapc; |
|
struct ceph_osd_request *req; |
|
int ret; |
|
|
|
spin_lock(&ci->i_ceph_lock); |
|
if (__ceph_have_pending_cap_snap(ci)) { |
|
struct ceph_cap_snap *capsnap = |
|
list_last_entry(&ci->i_cap_snaps, |
|
struct ceph_cap_snap, |
|
ci_item); |
|
snapc = ceph_get_snap_context(capsnap->context); |
|
} else { |
|
BUG_ON(!ci->i_head_snapc); |
|
snapc = ceph_get_snap_context(ci->i_head_snapc); |
|
} |
|
spin_unlock(&ci->i_ceph_lock); |
|
|
|
req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1, |
|
false, GFP_NOFS); |
|
if (!req) { |
|
ret = -ENOMEM; |
|
req = orig_req; |
|
goto out; |
|
} |
|
|
|
req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
|
ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc); |
|
ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid); |
|
|
|
req->r_ops[0] = orig_req->r_ops[0]; |
|
|
|
req->r_mtime = aio_req->mtime; |
|
req->r_data_offset = req->r_ops[0].extent.offset; |
|
|
|
ret = ceph_osdc_alloc_messages(req, GFP_NOFS); |
|
if (ret) { |
|
ceph_osdc_put_request(req); |
|
req = orig_req; |
|
goto out; |
|
} |
|
|
|
ceph_osdc_put_request(orig_req); |
|
|
|
req->r_callback = ceph_aio_complete_req; |
|
req->r_inode = inode; |
|
req->r_priv = aio_req; |
|
|
|
ret = ceph_osdc_start_request(req->r_osdc, req, false); |
|
out: |
|
if (ret < 0) { |
|
req->r_result = ret; |
|
ceph_aio_complete_req(req); |
|
} |
|
|
|
ceph_put_snap_context(snapc); |
|
kfree(aio_work); |
|
} |
|
|
|
static ssize_t |
|
ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, |
|
struct ceph_snap_context *snapc, |
|
struct ceph_cap_flush **pcf) |
|
{ |
|
struct file *file = iocb->ki_filp; |
|
struct inode *inode = file_inode(file); |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
|
struct ceph_client_metric *metric = &fsc->mdsc->metric; |
|
struct ceph_vino vino; |
|
struct ceph_osd_request *req; |
|
struct bio_vec *bvecs; |
|
struct ceph_aio_request *aio_req = NULL; |
|
int num_pages = 0; |
|
int flags; |
|
int ret = 0; |
|
struct timespec64 mtime = current_time(inode); |
|
size_t count = iov_iter_count(iter); |
|
loff_t pos = iocb->ki_pos; |
|
bool write = iov_iter_rw(iter) == WRITE; |
|
bool should_dirty = !write && iter_is_iovec(iter); |
|
|
|
if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP) |
|
return -EROFS; |
|
|
|
dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n", |
|
(write ? "write" : "read"), file, pos, (unsigned)count, |
|
snapc, snapc ? snapc->seq : 0); |
|
|
|
if (write) { |
|
int ret2 = invalidate_inode_pages2_range(inode->i_mapping, |
|
pos >> PAGE_SHIFT, |
|
(pos + count - 1) >> PAGE_SHIFT); |
|
if (ret2 < 0) |
|
dout("invalidate_inode_pages2_range returned %d\n", ret2); |
|
|
|
flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
|
} else { |
|
flags = CEPH_OSD_FLAG_READ; |
|
} |
|
|
|
while (iov_iter_count(iter) > 0) { |
|
u64 size = iov_iter_count(iter); |
|
ssize_t len; |
|
|
|
if (write) |
|
size = min_t(u64, size, fsc->mount_options->wsize); |
|
else |
|
size = min_t(u64, size, fsc->mount_options->rsize); |
|
|
|
vino = ceph_vino(inode); |
|
req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, |
|
vino, pos, &size, 0, |
|
1, |
|
write ? CEPH_OSD_OP_WRITE : |
|
CEPH_OSD_OP_READ, |
|
flags, snapc, |
|
ci->i_truncate_seq, |
|
ci->i_truncate_size, |
|
false); |
|
if (IS_ERR(req)) { |
|
ret = PTR_ERR(req); |
|
break; |
|
} |
|
|
|
len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages); |
|
if (len < 0) { |
|
ceph_osdc_put_request(req); |
|
ret = len; |
|
break; |
|
} |
|
if (len != size) |
|
osd_req_op_extent_update(req, 0, len); |
|
|
|
/* |
|
* To simplify error handling, allow AIO when IO within i_size |
|
* or IO can be satisfied by single OSD request. |
|
*/ |
|
if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) && |
|
(len == count || pos + count <= i_size_read(inode))) { |
|
aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL); |
|
if (aio_req) { |
|
aio_req->iocb = iocb; |
|
aio_req->write = write; |
|
aio_req->should_dirty = should_dirty; |
|
INIT_LIST_HEAD(&aio_req->osd_reqs); |
|
if (write) { |
|
aio_req->mtime = mtime; |
|
swap(aio_req->prealloc_cf, *pcf); |
|
} |
|
} |
|
/* ignore error */ |
|
} |
|
|
|
if (write) { |
|
/* |
|
* throw out any page cache pages in this range. this |
|
* may block. |
|
*/ |
|
truncate_inode_pages_range(inode->i_mapping, pos, |
|
PAGE_ALIGN(pos + len) - 1); |
|
|
|
req->r_mtime = mtime; |
|
} |
|
|
|
osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len); |
|
|
|
if (aio_req) { |
|
aio_req->total_len += len; |
|
aio_req->num_reqs++; |
|
atomic_inc(&aio_req->pending_reqs); |
|
|
|
req->r_callback = ceph_aio_complete_req; |
|
req->r_inode = inode; |
|
req->r_priv = aio_req; |
|
list_add_tail(&req->r_private_item, &aio_req->osd_reqs); |
|
|
|
pos += len; |
|
continue; |
|
} |
|
|
|
ret = ceph_osdc_start_request(req->r_osdc, req, false); |
|
if (!ret) |
|
ret = ceph_osdc_wait_request(&fsc->client->osdc, req); |
|
|
|
if (write) |
|
ceph_update_write_metrics(metric, req->r_start_latency, |
|
req->r_end_latency, len, ret); |
|
else |
|
ceph_update_read_metrics(metric, req->r_start_latency, |
|
req->r_end_latency, len, ret); |
|
|
|
size = i_size_read(inode); |
|
if (!write) { |
|
if (ret == -ENOENT) |
|
ret = 0; |
|
if (ret >= 0 && ret < len && pos + ret < size) { |
|
struct iov_iter i; |
|
int zlen = min_t(size_t, len - ret, |
|
size - pos - ret); |
|
|
|
iov_iter_bvec(&i, READ, bvecs, num_pages, len); |
|
iov_iter_advance(&i, ret); |
|
iov_iter_zero(zlen, &i); |
|
ret += zlen; |
|
} |
|
if (ret >= 0) |
|
len = ret; |
|
} |
|
|
|
put_bvecs(bvecs, num_pages, should_dirty); |
|
ceph_osdc_put_request(req); |
|
if (ret < 0) |
|
break; |
|
|
|
pos += len; |
|
if (!write && pos >= size) |
|
break; |
|
|
|
if (write && pos > size) { |
|
if (ceph_inode_set_size(inode, pos)) |
|
ceph_check_caps(ceph_inode(inode), |
|
CHECK_CAPS_AUTHONLY, |
|
NULL); |
|
} |
|
} |
|
|
|
if (aio_req) { |
|
LIST_HEAD(osd_reqs); |
|
|
|
if (aio_req->num_reqs == 0) { |
|
kfree(aio_req); |
|
return ret; |
|
} |
|
|
|
ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR : |
|
CEPH_CAP_FILE_RD); |
|
|
|
list_splice(&aio_req->osd_reqs, &osd_reqs); |
|
inode_dio_begin(inode); |
|
while (!list_empty(&osd_reqs)) { |
|
req = list_first_entry(&osd_reqs, |
|
struct ceph_osd_request, |
|
r_private_item); |
|
list_del_init(&req->r_private_item); |
|
if (ret >= 0) |
|
ret = ceph_osdc_start_request(req->r_osdc, |
|
req, false); |
|
if (ret < 0) { |
|
req->r_result = ret; |
|
ceph_aio_complete_req(req); |
|
} |
|
} |
|
return -EIOCBQUEUED; |
|
} |
|
|
|
if (ret != -EOLDSNAPC && pos > iocb->ki_pos) { |
|
ret = pos - iocb->ki_pos; |
|
iocb->ki_pos = pos; |
|
} |
|
return ret; |
|
} |
|
|
|
/* |
|
* Synchronous write, straight from __user pointer or user pages. |
|
* |
|
* If write spans object boundary, just do multiple writes. (For a |
|
* correct atomic write, we should e.g. take write locks on all |
|
* objects, rollback on failure, etc.) |
|
*/ |
|
static ssize_t |
|
ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos, |
|
struct ceph_snap_context *snapc) |
|
{ |
|
struct file *file = iocb->ki_filp; |
|
struct inode *inode = file_inode(file); |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
|
struct ceph_vino vino; |
|
struct ceph_osd_request *req; |
|
struct page **pages; |
|
u64 len; |
|
int num_pages; |
|
int written = 0; |
|
int flags; |
|
int ret; |
|
bool check_caps = false; |
|
struct timespec64 mtime = current_time(inode); |
|
size_t count = iov_iter_count(from); |
|
|
|
if (ceph_snap(file_inode(file)) != CEPH_NOSNAP) |
|
return -EROFS; |
|
|
|
dout("sync_write on file %p %lld~%u snapc %p seq %lld\n", |
|
file, pos, (unsigned)count, snapc, snapc->seq); |
|
|
|
ret = filemap_write_and_wait_range(inode->i_mapping, |
|
pos, pos + count - 1); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = invalidate_inode_pages2_range(inode->i_mapping, |
|
pos >> PAGE_SHIFT, |
|
(pos + count - 1) >> PAGE_SHIFT); |
|
if (ret < 0) |
|
dout("invalidate_inode_pages2_range returned %d\n", ret); |
|
|
|
flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
|
|
|
while ((len = iov_iter_count(from)) > 0) { |
|
size_t left; |
|
int n; |
|
|
|
vino = ceph_vino(inode); |
|
req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, |
|
vino, pos, &len, 0, 1, |
|
CEPH_OSD_OP_WRITE, flags, snapc, |
|
ci->i_truncate_seq, |
|
ci->i_truncate_size, |
|
false); |
|
if (IS_ERR(req)) { |
|
ret = PTR_ERR(req); |
|
break; |
|
} |
|
|
|
/* |
|
* write from beginning of first page, |
|
* regardless of io alignment |
|
*/ |
|
num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; |
|
|
|
pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); |
|
if (IS_ERR(pages)) { |
|
ret = PTR_ERR(pages); |
|
goto out; |
|
} |
|
|
|
left = len; |
|
for (n = 0; n < num_pages; n++) { |
|
size_t plen = min_t(size_t, left, PAGE_SIZE); |
|
ret = copy_page_from_iter(pages[n], 0, plen, from); |
|
if (ret != plen) { |
|
ret = -EFAULT; |
|
break; |
|
} |
|
left -= ret; |
|
} |
|
|
|
if (ret < 0) { |
|
ceph_release_page_vector(pages, num_pages); |
|
goto out; |
|
} |
|
|
|
req->r_inode = inode; |
|
|
|
osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, |
|
false, true); |
|
|
|
req->r_mtime = mtime; |
|
ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
|
if (!ret) |
|
ret = ceph_osdc_wait_request(&fsc->client->osdc, req); |
|
|
|
ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
|
req->r_end_latency, len, ret); |
|
out: |
|
ceph_osdc_put_request(req); |
|
if (ret != 0) { |
|
ceph_set_error_write(ci); |
|
break; |
|
} |
|
|
|
ceph_clear_error_write(ci); |
|
pos += len; |
|
written += len; |
|
if (pos > i_size_read(inode)) { |
|
check_caps = ceph_inode_set_size(inode, pos); |
|
if (check_caps) |
|
ceph_check_caps(ceph_inode(inode), |
|
CHECK_CAPS_AUTHONLY, |
|
NULL); |
|
} |
|
|
|
} |
|
|
|
if (ret != -EOLDSNAPC && written > 0) { |
|
ret = written; |
|
iocb->ki_pos = pos; |
|
} |
|
return ret; |
|
} |
|
|
|
/* |
|
* Wrap generic_file_aio_read with checks for cap bits on the inode. |
|
* Atomically grab references, so that those bits are not released |
|
* back to the MDS mid-read. |
|
* |
|
* Hmm, the sync read case isn't actually async... should it be? |
|
*/ |
|
static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to) |
|
{ |
|
struct file *filp = iocb->ki_filp; |
|
struct ceph_file_info *fi = filp->private_data; |
|
size_t len = iov_iter_count(to); |
|
struct inode *inode = file_inode(filp); |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
bool direct_lock = iocb->ki_flags & IOCB_DIRECT; |
|
ssize_t ret; |
|
int want, got = 0; |
|
int retry_op = 0, read = 0; |
|
|
|
again: |
|
dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n", |
|
inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode); |
|
|
|
if (direct_lock) |
|
ceph_start_io_direct(inode); |
|
else |
|
ceph_start_io_read(inode); |
|
|
|
if (fi->fmode & CEPH_FILE_MODE_LAZY) |
|
want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; |
|
else |
|
want = CEPH_CAP_FILE_CACHE; |
|
ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, &got); |
|
if (ret < 0) { |
|
if (iocb->ki_flags & IOCB_DIRECT) |
|
ceph_end_io_direct(inode); |
|
else |
|
ceph_end_io_read(inode); |
|
return ret; |
|
} |
|
|
|
if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || |
|
(iocb->ki_flags & IOCB_DIRECT) || |
|
(fi->flags & CEPH_F_SYNC)) { |
|
|
|
dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n", |
|
inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, |
|
ceph_cap_string(got)); |
|
|
|
if (ci->i_inline_version == CEPH_INLINE_NONE) { |
|
if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) { |
|
ret = ceph_direct_read_write(iocb, to, |
|
NULL, NULL); |
|
if (ret >= 0 && ret < len) |
|
retry_op = CHECK_EOF; |
|
} else { |
|
ret = ceph_sync_read(iocb, to, &retry_op); |
|
} |
|
} else { |
|
retry_op = READ_INLINE; |
|
} |
|
} else { |
|
CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
|
dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n", |
|
inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, |
|
ceph_cap_string(got)); |
|
ceph_add_rw_context(fi, &rw_ctx); |
|
ret = generic_file_read_iter(iocb, to); |
|
ceph_del_rw_context(fi, &rw_ctx); |
|
} |
|
|
|
dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n", |
|
inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret); |
|
ceph_put_cap_refs(ci, got); |
|
|
|
if (direct_lock) |
|
ceph_end_io_direct(inode); |
|
else |
|
ceph_end_io_read(inode); |
|
|
|
if (retry_op > HAVE_RETRIED && ret >= 0) { |
|
int statret; |
|
struct page *page = NULL; |
|
loff_t i_size; |
|
if (retry_op == READ_INLINE) { |
|
page = __page_cache_alloc(GFP_KERNEL); |
|
if (!page) |
|
return -ENOMEM; |
|
} |
|
|
|
statret = __ceph_do_getattr(inode, page, |
|
CEPH_STAT_CAP_INLINE_DATA, !!page); |
|
if (statret < 0) { |
|
if (page) |
|
__free_page(page); |
|
if (statret == -ENODATA) { |
|
BUG_ON(retry_op != READ_INLINE); |
|
goto again; |
|
} |
|
return statret; |
|
} |
|
|
|
i_size = i_size_read(inode); |
|
if (retry_op == READ_INLINE) { |
|
BUG_ON(ret > 0 || read > 0); |
|
if (iocb->ki_pos < i_size && |
|
iocb->ki_pos < PAGE_SIZE) { |
|
loff_t end = min_t(loff_t, i_size, |
|
iocb->ki_pos + len); |
|
end = min_t(loff_t, end, PAGE_SIZE); |
|
if (statret < end) |
|
zero_user_segment(page, statret, end); |
|
ret = copy_page_to_iter(page, |
|
iocb->ki_pos & ~PAGE_MASK, |
|
end - iocb->ki_pos, to); |
|
iocb->ki_pos += ret; |
|
read += ret; |
|
} |
|
if (iocb->ki_pos < i_size && read < len) { |
|
size_t zlen = min_t(size_t, len - read, |
|
i_size - iocb->ki_pos); |
|
ret = iov_iter_zero(zlen, to); |
|
iocb->ki_pos += ret; |
|
read += ret; |
|
} |
|
__free_pages(page, 0); |
|
return read; |
|
} |
|
|
|
/* hit EOF or hole? */ |
|
if (retry_op == CHECK_EOF && iocb->ki_pos < i_size && |
|
ret < len) { |
|
dout("sync_read hit hole, ppos %lld < size %lld" |
|
", reading more\n", iocb->ki_pos, i_size); |
|
|
|
read += ret; |
|
len -= ret; |
|
retry_op = HAVE_RETRIED; |
|
goto again; |
|
} |
|
} |
|
|
|
if (ret >= 0) |
|
ret += read; |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Take cap references to avoid releasing caps to MDS mid-write. |
|
* |
|
* If we are synchronous, and write with an old snap context, the OSD |
|
* may return EOLDSNAPC. In that case, retry the write.. _after_ |
|
* dropping our cap refs and allowing the pending snap to logically |
|
* complete _before_ this write occurs. |
|
* |
|
* If we are near ENOSPC, write synchronously. |
|
*/ |
|
static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) |
|
{ |
|
struct file *file = iocb->ki_filp; |
|
struct ceph_file_info *fi = file->private_data; |
|
struct inode *inode = file_inode(file); |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
|
struct ceph_osd_client *osdc = &fsc->client->osdc; |
|
struct ceph_cap_flush *prealloc_cf; |
|
ssize_t count, written = 0; |
|
int err, want, got; |
|
bool direct_lock = false; |
|
u32 map_flags; |
|
u64 pool_flags; |
|
loff_t pos; |
|
loff_t limit = max(i_size_read(inode), fsc->max_file_size); |
|
|
|
if (ceph_snap(inode) != CEPH_NOSNAP) |
|
return -EROFS; |
|
|
|
prealloc_cf = ceph_alloc_cap_flush(); |
|
if (!prealloc_cf) |
|
return -ENOMEM; |
|
|
|
if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT) |
|
direct_lock = true; |
|
|
|
retry_snap: |
|
if (direct_lock) |
|
ceph_start_io_direct(inode); |
|
else |
|
ceph_start_io_write(inode); |
|
|
|
/* We can write back this queue in page reclaim */ |
|
current->backing_dev_info = inode_to_bdi(inode); |
|
|
|
if (iocb->ki_flags & IOCB_APPEND) { |
|
err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); |
|
if (err < 0) |
|
goto out; |
|
} |
|
|
|
err = generic_write_checks(iocb, from); |
|
if (err <= 0) |
|
goto out; |
|
|
|
pos = iocb->ki_pos; |
|
if (unlikely(pos >= limit)) { |
|
err = -EFBIG; |
|
goto out; |
|
} else { |
|
iov_iter_truncate(from, limit - pos); |
|
} |
|
|
|
count = iov_iter_count(from); |
|
if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { |
|
err = -EDQUOT; |
|
goto out; |
|
} |
|
|
|
err = file_remove_privs(file); |
|
if (err) |
|
goto out; |
|
|
|
err = file_update_time(file); |
|
if (err) |
|
goto out; |
|
|
|
inode_inc_iversion_raw(inode); |
|
|
|
if (ci->i_inline_version != CEPH_INLINE_NONE) { |
|
err = ceph_uninline_data(file, NULL); |
|
if (err < 0) |
|
goto out; |
|
} |
|
|
|
down_read(&osdc->lock); |
|
map_flags = osdc->osdmap->flags; |
|
pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id); |
|
up_read(&osdc->lock); |
|
if ((map_flags & CEPH_OSDMAP_FULL) || |
|
(pool_flags & CEPH_POOL_FLAG_FULL)) { |
|
err = -ENOSPC; |
|
goto out; |
|
} |
|
|
|
dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n", |
|
inode, ceph_vinop(inode), pos, count, i_size_read(inode)); |
|
if (fi->fmode & CEPH_FILE_MODE_LAZY) |
|
want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; |
|
else |
|
want = CEPH_CAP_FILE_BUFFER; |
|
got = 0; |
|
err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, &got); |
|
if (err < 0) |
|
goto out; |
|
|
|
dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n", |
|
inode, ceph_vinop(inode), pos, count, ceph_cap_string(got)); |
|
|
|
if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || |
|
(iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) || |
|
(ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) { |
|
struct ceph_snap_context *snapc; |
|
struct iov_iter data; |
|
|
|
spin_lock(&ci->i_ceph_lock); |
|
if (__ceph_have_pending_cap_snap(ci)) { |
|
struct ceph_cap_snap *capsnap = |
|
list_last_entry(&ci->i_cap_snaps, |
|
struct ceph_cap_snap, |
|
ci_item); |
|
snapc = ceph_get_snap_context(capsnap->context); |
|
} else { |
|
BUG_ON(!ci->i_head_snapc); |
|
snapc = ceph_get_snap_context(ci->i_head_snapc); |
|
} |
|
spin_unlock(&ci->i_ceph_lock); |
|
|
|
/* we might need to revert back to that point */ |
|
data = *from; |
|
if (iocb->ki_flags & IOCB_DIRECT) |
|
written = ceph_direct_read_write(iocb, &data, snapc, |
|
&prealloc_cf); |
|
else |
|
written = ceph_sync_write(iocb, &data, pos, snapc); |
|
if (direct_lock) |
|
ceph_end_io_direct(inode); |
|
else |
|
ceph_end_io_write(inode); |
|
if (written > 0) |
|
iov_iter_advance(from, written); |
|
ceph_put_snap_context(snapc); |
|
} else { |
|
/* |
|
* No need to acquire the i_truncate_mutex. Because |
|
* the MDS revokes Fwb caps before sending truncate |
|
* message to us. We can't get Fwb cap while there |
|
* are pending vmtruncate. So write and vmtruncate |
|
* can not run at the same time |
|
*/ |
|
written = generic_perform_write(file, from, pos); |
|
if (likely(written >= 0)) |
|
iocb->ki_pos = pos + written; |
|
ceph_end_io_write(inode); |
|
} |
|
|
|
if (written >= 0) { |
|
int dirty; |
|
|
|
spin_lock(&ci->i_ceph_lock); |
|
ci->i_inline_version = CEPH_INLINE_NONE; |
|
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
|
&prealloc_cf); |
|
spin_unlock(&ci->i_ceph_lock); |
|
if (dirty) |
|
__mark_inode_dirty(inode, dirty); |
|
if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos)) |
|
ceph_check_caps(ci, 0, NULL); |
|
} |
|
|
|
dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n", |
|
inode, ceph_vinop(inode), pos, (unsigned)count, |
|
ceph_cap_string(got)); |
|
ceph_put_cap_refs(ci, got); |
|
|
|
if (written == -EOLDSNAPC) { |
|
dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n", |
|
inode, ceph_vinop(inode), pos, (unsigned)count); |
|
goto retry_snap; |
|
} |
|
|
|
if (written >= 0) { |
|
if ((map_flags & CEPH_OSDMAP_NEARFULL) || |
|
(pool_flags & CEPH_POOL_FLAG_NEARFULL)) |
|
iocb->ki_flags |= IOCB_DSYNC; |
|
written = generic_write_sync(iocb, written); |
|
} |
|
|
|
goto out_unlocked; |
|
out: |
|
if (direct_lock) |
|
ceph_end_io_direct(inode); |
|
else |
|
ceph_end_io_write(inode); |
|
out_unlocked: |
|
ceph_free_cap_flush(prealloc_cf); |
|
current->backing_dev_info = NULL; |
|
return written ? written : err; |
|
} |
|
|
|
/* |
|
* llseek. be sure to verify file size on SEEK_END. |
|
*/ |
|
static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) |
|
{ |
|
struct inode *inode = file->f_mapping->host; |
|
struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
|
loff_t i_size; |
|
loff_t ret; |
|
|
|
inode_lock(inode); |
|
|
|
if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { |
|
ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); |
|
if (ret < 0) |
|
goto out; |
|
} |
|
|
|
i_size = i_size_read(inode); |
|
switch (whence) { |
|
case SEEK_END: |
|
offset += i_size; |
|
break; |
|
case SEEK_CUR: |
|
/* |
|
* Here we special-case the lseek(fd, 0, SEEK_CUR) |
|
* position-querying operation. Avoid rewriting the "same" |
|
* f_pos value back to the file because a concurrent read(), |
|
* write() or lseek() might have altered it |
|
*/ |
|
if (offset == 0) { |
|
ret = file->f_pos; |
|
goto out; |
|
} |
|
offset += file->f_pos; |
|
break; |
|
case SEEK_DATA: |
|
if (offset < 0 || offset >= i_size) { |
|
ret = -ENXIO; |
|
goto out; |
|
} |
|
break; |
|
case SEEK_HOLE: |
|
if (offset < 0 || offset >= i_size) { |
|
ret = -ENXIO; |
|
goto out; |
|
} |
|
offset = i_size; |
|
break; |
|
} |
|
|
|
ret = vfs_setpos(file, offset, max(i_size, fsc->max_file_size)); |
|
|
|
out: |
|
inode_unlock(inode); |
|
return ret; |
|
} |
|
|
|
static inline void ceph_zero_partial_page( |
|
struct inode *inode, loff_t offset, unsigned size) |
|
{ |
|
struct page *page; |
|
pgoff_t index = offset >> PAGE_SHIFT; |
|
|
|
page = find_lock_page(inode->i_mapping, index); |
|
if (page) { |
|
wait_on_page_writeback(page); |
|
zero_user(page, offset & (PAGE_SIZE - 1), size); |
|
unlock_page(page); |
|
put_page(page); |
|
} |
|
} |
|
|
|
static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset, |
|
loff_t length) |
|
{ |
|
loff_t nearly = round_up(offset, PAGE_SIZE); |
|
if (offset < nearly) { |
|
loff_t size = nearly - offset; |
|
if (length < size) |
|
size = length; |
|
ceph_zero_partial_page(inode, offset, size); |
|
offset += size; |
|
length -= size; |
|
} |
|
if (length >= PAGE_SIZE) { |
|
loff_t size = round_down(length, PAGE_SIZE); |
|
truncate_pagecache_range(inode, offset, offset + size - 1); |
|
offset += size; |
|
length -= size; |
|
} |
|
if (length) |
|
ceph_zero_partial_page(inode, offset, length); |
|
} |
|
|
|
static int ceph_zero_partial_object(struct inode *inode, |
|
loff_t offset, loff_t *length) |
|
{ |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
|
struct ceph_osd_request *req; |
|
int ret = 0; |
|
loff_t zero = 0; |
|
int op; |
|
|
|
if (!length) { |
|
op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE; |
|
length = &zero; |
|
} else { |
|
op = CEPH_OSD_OP_ZERO; |
|
} |
|
|
|
req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, |
|
ceph_vino(inode), |
|
offset, length, |
|
0, 1, op, |
|
CEPH_OSD_FLAG_WRITE, |
|
NULL, 0, 0, false); |
|
if (IS_ERR(req)) { |
|
ret = PTR_ERR(req); |
|
goto out; |
|
} |
|
|
|
req->r_mtime = inode->i_mtime; |
|
ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
|
if (!ret) { |
|
ret = ceph_osdc_wait_request(&fsc->client->osdc, req); |
|
if (ret == -ENOENT) |
|
ret = 0; |
|
} |
|
ceph_osdc_put_request(req); |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) |
|
{ |
|
int ret = 0; |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
s32 stripe_unit = ci->i_layout.stripe_unit; |
|
s32 stripe_count = ci->i_layout.stripe_count; |
|
s32 object_size = ci->i_layout.object_size; |
|
u64 object_set_size = object_size * stripe_count; |
|
u64 nearly, t; |
|
|
|
/* round offset up to next period boundary */ |
|
nearly = offset + object_set_size - 1; |
|
t = nearly; |
|
nearly -= do_div(t, object_set_size); |
|
|
|
while (length && offset < nearly) { |
|
loff_t size = length; |
|
ret = ceph_zero_partial_object(inode, offset, &size); |
|
if (ret < 0) |
|
return ret; |
|
offset += size; |
|
length -= size; |
|
} |
|
while (length >= object_set_size) { |
|
int i; |
|
loff_t pos = offset; |
|
for (i = 0; i < stripe_count; ++i) { |
|
ret = ceph_zero_partial_object(inode, pos, NULL); |
|
if (ret < 0) |
|
return ret; |
|
pos += stripe_unit; |
|
} |
|
offset += object_set_size; |
|
length -= object_set_size; |
|
} |
|
while (length) { |
|
loff_t size = length; |
|
ret = ceph_zero_partial_object(inode, offset, &size); |
|
if (ret < 0) |
|
return ret; |
|
offset += size; |
|
length -= size; |
|
} |
|
return ret; |
|
} |
|
|
|
static long ceph_fallocate(struct file *file, int mode, |
|
loff_t offset, loff_t length) |
|
{ |
|
struct ceph_file_info *fi = file->private_data; |
|
struct inode *inode = file_inode(file); |
|
struct ceph_inode_info *ci = ceph_inode(inode); |
|
struct ceph_cap_flush *prealloc_cf; |
|
int want, got = 0; |
|
int dirty; |
|
int ret = 0; |
|
loff_t endoff = 0; |
|
loff_t size; |
|
|
|
if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
|
return -EOPNOTSUPP; |
|
|
|
if (!S_ISREG(inode->i_mode)) |
|
return -EOPNOTSUPP; |
|
|
|
prealloc_cf = ceph_alloc_cap_flush(); |
|
if (!prealloc_cf) |
|
return -ENOMEM; |
|
|
|
inode_lock(inode); |
|
|
|
if (ceph_snap(inode) != CEPH_NOSNAP) { |
|
ret = -EROFS; |
|
goto unlock; |
|
} |
|
|
|
if (ci->i_inline_version != CEPH_INLINE_NONE) { |
|
ret = ceph_uninline_data(file, NULL); |
|
if (ret < 0) |
|
goto unlock; |
|
} |
|
|
|
size = i_size_read(inode); |
|
|
|
/* Are we punching a hole beyond EOF? */ |
|
if (offset >= size) |
|
goto unlock; |
|
if ((offset + length) > size) |
|
length = size - offset; |
|
|
|
if (fi->fmode & CEPH_FILE_MODE_LAZY) |
|
want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; |
|
else |
|
want = CEPH_CAP_FILE_BUFFER; |
|
|
|
ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got); |
|
if (ret < 0) |
|
goto unlock; |
|
|
|
ceph_zero_pagecache_range(inode, offset, length); |
|
ret = ceph_zero_objects(inode, offset, length); |
|
|
|
if (!ret) { |
|
spin_lock(&ci->i_ceph_lock); |
|
ci->i_inline_version = CEPH_INLINE_NONE; |
|
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
|
&prealloc_cf); |
|
spin_unlock(&ci->i_ceph_lock); |
|
if (dirty) |
|
__mark_inode_dirty(inode, dirty); |
|
} |
|
|
|
ceph_put_cap_refs(ci, got); |
|
unlock: |
|
inode_unlock(inode); |
|
ceph_free_cap_flush(prealloc_cf); |
|
return ret; |
|
} |
|
|
|
/* |
|
* This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for |
|
* src_ci. Two attempts are made to obtain both caps, and an error is return if |
|
* this fails; zero is returned on success. |
|
*/ |
|
static int get_rd_wr_caps(struct file *src_filp, int *src_got, |
|
struct file *dst_filp, |
|
loff_t dst_endoff, int *dst_got) |
|
{ |
|
int ret = 0; |
|
bool retrying = false; |
|
|
|
retry_caps: |
|
ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER, |
|
dst_endoff, dst_got); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* |
|
* Since we're already holding the FILE_WR capability for the dst file, |
|
* we would risk a deadlock by using ceph_get_caps. Thus, we'll do some |
|
* retry dance instead to try to get both capabilities. |
|
*/ |
|
ret = ceph_try_get_caps(file_inode(src_filp), |
|
CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED, |
|
false, src_got); |
|
if (ret <= 0) { |
|
/* Start by dropping dst_ci caps and getting src_ci caps */ |
|
ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got); |
|
if (retrying) { |
|
if (!ret) |
|
/* ceph_try_get_caps masks EAGAIN */ |
|
ret = -EAGAIN; |
|
return ret; |
|
} |
|
ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD, |
|
CEPH_CAP_FILE_SHARED, -1, src_got); |
|
if (ret < 0) |
|
return ret; |
|
/*... drop src_ci caps too, and retry */ |
|
ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got); |
|
retrying = true; |
|
goto retry_caps; |
|
} |
|
return ret; |
|
} |
|
|
|
static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got, |
|
struct ceph_inode_info *dst_ci, int dst_got) |
|
{ |
|
ceph_put_cap_refs(src_ci, src_got); |
|
ceph_put_cap_refs(dst_ci, dst_got); |
|
} |
|
|
|
/* |
|
* This function does several size-related checks, returning an error if: |
|
* - source file is smaller than off+len |
|
* - destination file size is not OK (inode_newsize_ok()) |
|
* - max bytes quotas is exceeded |
|
*/ |
|
static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode, |
|
loff_t src_off, loff_t dst_off, size_t len) |
|
{ |
|
loff_t size, endoff; |
|
|
|
size = i_size_read(src_inode); |
|
/* |
|
* Don't copy beyond source file EOF. Instead of simply setting length |
|
* to (size - src_off), just drop to VFS default implementation, as the |
|
* local i_size may be stale due to other clients writing to the source |
|
* inode. |
|
*/ |
|
if (src_off + len > size) { |
|
dout("Copy beyond EOF (%llu + %zu > %llu)\n", |
|
src_off, len, size); |
|
return -EOPNOTSUPP; |
|
} |
|
size = i_size_read(dst_inode); |
|
|
|
endoff = dst_off + len; |
|
if (inode_newsize_ok(dst_inode, endoff)) |
|
return -EOPNOTSUPP; |
|
|
|
if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff)) |
|
return -EDQUOT; |
|
|
|
return 0; |
|
} |
|
|
|
static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off, |
|
struct ceph_inode_info *dst_ci, u64 *dst_off, |
|
struct ceph_fs_client *fsc, |
|
size_t len, unsigned int flags) |
|
{ |
|
struct ceph_object_locator src_oloc, dst_oloc; |
|
struct ceph_object_id src_oid, dst_oid; |
|
size_t bytes = 0; |
|
u64 src_objnum, src_objoff, dst_objnum, dst_objoff; |
|
u32 src_objlen, dst_objlen; |
|
u32 object_size = src_ci->i_layout.object_size; |
|
int ret; |
|
|
|
src_oloc.pool = src_ci->i_layout.pool_id; |
|
src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns); |
|
dst_oloc.pool = dst_ci->i_layout.pool_id; |
|
dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns); |
|
|
|
while (len >= object_size) { |
|
ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off, |
|
object_size, &src_objnum, |
|
&src_objoff, &src_objlen); |
|
ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off, |
|
object_size, &dst_objnum, |
|
&dst_objoff, &dst_objlen); |
|
ceph_oid_init(&src_oid); |
|
ceph_oid_printf(&src_oid, "%llx.%08llx", |
|
src_ci->i_vino.ino, src_objnum); |
|
ceph_oid_init(&dst_oid); |
|
ceph_oid_printf(&dst_oid, "%llx.%08llx", |
|
dst_ci->i_vino.ino, dst_objnum); |
|
/* Do an object remote copy */ |
|
ret = ceph_osdc_copy_from(&fsc->client->osdc, |
|
src_ci->i_vino.snap, 0, |
|
&src_oid, &src_oloc, |
|
CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | |
|
CEPH_OSD_OP_FLAG_FADVISE_NOCACHE, |
|
&dst_oid, &dst_oloc, |
|
CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | |
|
CEPH_OSD_OP_FLAG_FADVISE_DONTNEED, |
|
dst_ci->i_truncate_seq, |
|
dst_ci->i_truncate_size, |
|
CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ); |
|
if (ret) { |
|
if (ret == -EOPNOTSUPP) { |
|
fsc->have_copy_from2 = false; |
|
pr_notice("OSDs don't support copy-from2; disabling copy offload\n"); |
|
} |
|
dout("ceph_osdc_copy_from returned %d\n", ret); |
|
if (!bytes) |
|
bytes = ret; |
|
goto out; |
|
} |
|
len -= object_size; |
|
bytes += object_size; |
|
*src_off += object_size; |
|
*dst_off += object_size; |
|
} |
|
|
|
out: |
|
ceph_oloc_destroy(&src_oloc); |
|
ceph_oloc_destroy(&dst_oloc); |
|
return bytes; |
|
} |
|
|
|
static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, |
|
struct file *dst_file, loff_t dst_off, |
|
size_t len, unsigned int flags) |
|
{ |
|
struct inode *src_inode = file_inode(src_file); |
|
struct inode *dst_inode = file_inode(dst_file); |
|
struct ceph_inode_info *src_ci = ceph_inode(src_inode); |
|
struct ceph_inode_info *dst_ci = ceph_inode(dst_inode); |
|
struct ceph_cap_flush *prealloc_cf; |
|
struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode); |
|
loff_t size; |
|
ssize_t ret = -EIO, bytes; |
|
u64 src_objnum, dst_objnum, src_objoff, dst_objoff; |
|
u32 src_objlen, dst_objlen; |
|
int src_got = 0, dst_got = 0, err, dirty; |
|
|
|
if (src_inode->i_sb != dst_inode->i_sb) { |
|
struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode); |
|
|
|
if (ceph_fsid_compare(&src_fsc->client->fsid, |
|
&dst_fsc->client->fsid)) { |
|
dout("Copying files across clusters: src: %pU dst: %pU\n", |
|
&src_fsc->client->fsid, &dst_fsc->client->fsid); |
|
return -EXDEV; |
|
} |
|
} |
|
if (ceph_snap(dst_inode) != CEPH_NOSNAP) |
|
return -EROFS; |
|
|
|
/* |
|
* Some of the checks below will return -EOPNOTSUPP, which will force a |
|
* fallback to the default VFS copy_file_range implementation. This is |
|
* desirable in several cases (for ex, the 'len' is smaller than the |
|
* size of the objects, or in cases where that would be more |
|
* efficient). |
|
*/ |
|
|
|
if (ceph_test_mount_opt(src_fsc, NOCOPYFROM)) |
|
return -EOPNOTSUPP; |
|
|
|
if (!src_fsc->have_copy_from2) |
|
return -EOPNOTSUPP; |
|
|
|
/* |
|
* Striped file layouts require that we copy partial objects, but the |
|
* OSD copy-from operation only supports full-object copies. Limit |
|
* this to non-striped file layouts for now. |
|
*/ |
|
if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) || |
|
(src_ci->i_layout.stripe_count != 1) || |
|
(dst_ci->i_layout.stripe_count != 1) || |
|
(src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) { |
|
dout("Invalid src/dst files layout\n"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (len < src_ci->i_layout.object_size) |
|
return -EOPNOTSUPP; /* no remote copy will be done */ |
|
|
|
prealloc_cf = ceph_alloc_cap_flush(); |
|
if (!prealloc_cf) |
|
return -ENOMEM; |
|
|
|
/* Start by sync'ing the source and destination files */ |
|
ret = file_write_and_wait_range(src_file, src_off, (src_off + len)); |
|
if (ret < 0) { |
|
dout("failed to write src file (%zd)\n", ret); |
|
goto out; |
|
} |
|
ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len)); |
|
if (ret < 0) { |
|
dout("failed to write dst file (%zd)\n", ret); |
|
goto out; |
|
} |
|
|
|
/* |
|
* We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other |
|
* clients may have dirty data in their caches. And OSDs know nothing |
|
* about caps, so they can't safely do the remote object copies. |
|
*/ |
|
err = get_rd_wr_caps(src_file, &src_got, |
|
dst_file, (dst_off + len), &dst_got); |
|
if (err < 0) { |
|
dout("get_rd_wr_caps returned %d\n", err); |
|
ret = -EOPNOTSUPP; |
|
goto out; |
|
} |
|
|
|
ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len); |
|
if (ret < 0) |
|
goto out_caps; |
|
|
|
/* Drop dst file cached pages */ |
|
ret = invalidate_inode_pages2_range(dst_inode->i_mapping, |
|
dst_off >> PAGE_SHIFT, |
|
(dst_off + len) >> PAGE_SHIFT); |
|
if (ret < 0) { |
|
dout("Failed to invalidate inode pages (%zd)\n", ret); |
|
ret = 0; /* XXX */ |
|
} |
|
ceph_calc_file_object_mapping(&src_ci->i_layout, src_off, |
|
src_ci->i_layout.object_size, |
|
&src_objnum, &src_objoff, &src_objlen); |
|
ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off, |
|
dst_ci->i_layout.object_size, |
|
&dst_objnum, &dst_objoff, &dst_objlen); |
|
/* object-level offsets need to the same */ |
|
if (src_objoff != dst_objoff) { |
|
ret = -EOPNOTSUPP; |
|
goto out_caps; |
|
} |
|
|
|
/* |
|
* Do a manual copy if the object offset isn't object aligned. |
|
* 'src_objlen' contains the bytes left until the end of the object, |
|
* starting at the src_off |
|
*/ |
|
if (src_objoff) { |
|
dout("Initial partial copy of %u bytes\n", src_objlen); |
|
|
|
/* |
|
* we need to temporarily drop all caps as we'll be calling |
|
* {read,write}_iter, which will get caps again. |
|
*/ |
|
put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); |
|
ret = do_splice_direct(src_file, &src_off, dst_file, |
|
&dst_off, src_objlen, flags); |
|
/* Abort on short copies or on error */ |
|
if (ret < src_objlen) { |
|
dout("Failed partial copy (%zd)\n", ret); |
|
goto out; |
|
} |
|
len -= ret; |
|
err = get_rd_wr_caps(src_file, &src_got, |
|
dst_file, (dst_off + len), &dst_got); |
|
if (err < 0) |
|
goto out; |
|
err = is_file_size_ok(src_inode, dst_inode, |
|
src_off, dst_off, len); |
|
if (err < 0) |
|
goto out_caps; |
|
} |
|
|
|
size = i_size_read(dst_inode); |
|
bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off, |
|
src_fsc, len, flags); |
|
if (bytes <= 0) { |
|
if (!ret) |
|
ret = bytes; |
|
goto out_caps; |
|
} |
|
dout("Copied %zu bytes out of %zu\n", bytes, len); |
|
len -= bytes; |
|
ret += bytes; |
|
|
|
file_update_time(dst_file); |
|
inode_inc_iversion_raw(dst_inode); |
|
|
|
if (dst_off > size) { |
|
/* Let the MDS know about dst file size change */ |
|
if (ceph_inode_set_size(dst_inode, dst_off) || |
|
ceph_quota_is_max_bytes_approaching(dst_inode, dst_off)) |
|
ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY, NULL); |
|
} |
|
/* Mark Fw dirty */ |
|
spin_lock(&dst_ci->i_ceph_lock); |
|
dst_ci->i_inline_version = CEPH_INLINE_NONE; |
|
dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf); |
|
spin_unlock(&dst_ci->i_ceph_lock); |
|
if (dirty) |
|
__mark_inode_dirty(dst_inode, dirty); |
|
|
|
out_caps: |
|
put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); |
|
|
|
/* |
|
* Do the final manual copy if we still have some bytes left, unless |
|
* there were errors in remote object copies (len >= object_size). |
|
*/ |
|
if (len && (len < src_ci->i_layout.object_size)) { |
|
dout("Final partial copy of %zu bytes\n", len); |
|
bytes = do_splice_direct(src_file, &src_off, dst_file, |
|
&dst_off, len, flags); |
|
if (bytes > 0) |
|
ret += bytes; |
|
else |
|
dout("Failed partial copy (%zd)\n", bytes); |
|
} |
|
|
|
out: |
|
ceph_free_cap_flush(prealloc_cf); |
|
|
|
return ret; |
|
} |
|
|
|
static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, |
|
struct file *dst_file, loff_t dst_off, |
|
size_t len, unsigned int flags) |
|
{ |
|
ssize_t ret; |
|
|
|
ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off, |
|
len, flags); |
|
|
|
if (ret == -EOPNOTSUPP || ret == -EXDEV) |
|
ret = generic_copy_file_range(src_file, src_off, dst_file, |
|
dst_off, len, flags); |
|
return ret; |
|
} |
|
|
|
const struct file_operations ceph_file_fops = { |
|
.open = ceph_open, |
|
.release = ceph_release, |
|
.llseek = ceph_llseek, |
|
.read_iter = ceph_read_iter, |
|
.write_iter = ceph_write_iter, |
|
.mmap = ceph_mmap, |
|
.fsync = ceph_fsync, |
|
.lock = ceph_lock, |
|
.setlease = simple_nosetlease, |
|
.flock = ceph_flock, |
|
.splice_read = generic_file_splice_read, |
|
.splice_write = iter_file_splice_write, |
|
.unlocked_ioctl = ceph_ioctl, |
|
.compat_ioctl = compat_ptr_ioctl, |
|
.fallocate = ceph_fallocate, |
|
.copy_file_range = ceph_copy_file_range, |
|
};
|
|
|