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Diffstat (limited to 'fs/ceph/mds_client.c')
-rw-r--r--fs/ceph/mds_client.c279
1 files changed, 165 insertions, 114 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index c4a5fd94bbbb..1740047aef0f 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -827,7 +827,7 @@ static void destroy_reply_info(struct ceph_mds_reply_info_parsed *info)
* And the worst case is that for the none async openc request it will
* successfully open the file if the CDentry hasn't been unlinked yet,
* but later the previous delayed async unlink request will remove the
- * CDenty. That means the just created file is possiblly deleted later
+ * CDentry. That means the just created file is possibly deleted later
* by accident.
*
* We need to wait for the inflight async unlink requests to finish
@@ -979,14 +979,15 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
if (mds >= mdsc->max_sessions) {
int newmax = 1 << get_count_order(mds + 1);
struct ceph_mds_session **sa;
+ size_t ptr_size = sizeof(struct ceph_mds_session *);
doutc(cl, "realloc to %d\n", newmax);
- sa = kcalloc(newmax, sizeof(void *), GFP_NOFS);
+ sa = kcalloc(newmax, ptr_size, GFP_NOFS);
if (!sa)
goto fail_realloc;
if (mdsc->sessions) {
memcpy(sa, mdsc->sessions,
- mdsc->max_sessions * sizeof(void *));
+ mdsc->max_sessions * ptr_size);
kfree(mdsc->sessions);
}
mdsc->sessions = sa;
@@ -1747,14 +1748,6 @@ static void __open_export_target_sessions(struct ceph_mds_client *mdsc,
}
}
-void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc,
- struct ceph_mds_session *session)
-{
- mutex_lock(&mdsc->mutex);
- __open_export_target_sessions(mdsc, session);
- mutex_unlock(&mdsc->mutex);
-}
-
/*
* session caps
*/
@@ -2229,7 +2222,7 @@ static int trim_caps_cb(struct inode *inode, int mds, void *arg)
int count;
dput(dentry);
d_prune_aliases(inode);
- count = atomic_read(&inode->i_count);
+ count = icount_read(inode);
if (count == 1)
(*remaining)--;
doutc(cl, "%p %llx.%llx cap %p pruned, count now %d\n",
@@ -2362,7 +2355,7 @@ again:
item->ino = cpu_to_le64(cap->cap_ino);
item->cap_id = cpu_to_le64(cap->cap_id);
item->migrate_seq = cpu_to_le32(cap->mseq);
- item->seq = cpu_to_le32(cap->issue_seq);
+ item->issue_seq = cpu_to_le32(cap->issue_seq);
msg->front.iov_len += sizeof(*item);
ceph_put_cap(mdsc, cap);
@@ -2540,6 +2533,7 @@ int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req,
struct ceph_mount_options *opt = req->r_mdsc->fsc->mount_options;
size_t size = sizeof(struct ceph_mds_reply_dir_entry);
unsigned int num_entries;
+ u64 bytes_count;
int order;
spin_lock(&ci->i_ceph_lock);
@@ -2548,7 +2542,11 @@ int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req,
num_entries = max(num_entries, 1U);
num_entries = min(num_entries, opt->max_readdir);
- order = get_order(size * num_entries);
+ bytes_count = (u64)size * num_entries;
+ if (unlikely(bytes_count > ULONG_MAX))
+ bytes_count = ULONG_MAX;
+
+ order = get_order((unsigned long)bytes_count);
while (order >= 0) {
rinfo->dir_entries = (void*)__get_free_pages(GFP_KERNEL |
__GFP_NOWARN |
@@ -2558,7 +2556,7 @@ int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req,
break;
order--;
}
- if (!rinfo->dir_entries)
+ if (!rinfo->dir_entries || unlikely(order < 0))
return -ENOMEM;
num_entries = (PAGE_SIZE << order) / size;
@@ -2629,6 +2627,7 @@ static u8 *get_fscrypt_altname(const struct ceph_mds_request *req, u32 *plen)
{
struct inode *dir = req->r_parent;
struct dentry *dentry = req->r_dentry;
+ const struct qstr *name = req->r_dname;
u8 *cryptbuf = NULL;
u32 len = 0;
int ret = 0;
@@ -2649,8 +2648,10 @@ static u8 *get_fscrypt_altname(const struct ceph_mds_request *req, u32 *plen)
if (!fscrypt_has_encryption_key(dir))
goto success;
- if (!fscrypt_fname_encrypted_size(dir, dentry->d_name.len, NAME_MAX,
- &len)) {
+ if (!name)
+ name = &dentry->d_name;
+
+ if (!fscrypt_fname_encrypted_size(dir, name->len, NAME_MAX, &len)) {
WARN_ON_ONCE(1);
return ERR_PTR(-ENAMETOOLONG);
}
@@ -2665,7 +2666,7 @@ static u8 *get_fscrypt_altname(const struct ceph_mds_request *req, u32 *plen)
if (!cryptbuf)
return ERR_PTR(-ENOMEM);
- ret = fscrypt_fname_encrypt(dir, &dentry->d_name, cryptbuf, len);
+ ret = fscrypt_fname_encrypt(dir, name, cryptbuf, len);
if (ret) {
kfree(cryptbuf);
return ERR_PTR(ret);
@@ -2686,8 +2687,7 @@ static u8 *get_fscrypt_altname(const struct ceph_mds_request *req, u32 *plen)
* ceph_mdsc_build_path - build a path string to a given dentry
* @mdsc: mds client
* @dentry: dentry to which path should be built
- * @plen: returned length of string
- * @pbase: returned base inode number
+ * @path_info: output path, length, base ino+snap, and freepath ownership flag
* @for_wire: is this path going to be sent to the MDS?
*
* Build a string that represents the path to the dentry. This is mostly called
@@ -2705,7 +2705,7 @@ static u8 *get_fscrypt_altname(const struct ceph_mds_request *req, u32 *plen)
* foo/.snap/bar -> foo//bar
*/
char *ceph_mdsc_build_path(struct ceph_mds_client *mdsc, struct dentry *dentry,
- int *plen, u64 *pbase, int for_wire)
+ struct ceph_path_info *path_info, int for_wire)
{
struct ceph_client *cl = mdsc->fsc->client;
struct dentry *cur;
@@ -2771,8 +2771,8 @@ retry:
}
if (fscrypt_has_encryption_key(d_inode(parent))) {
- len = ceph_encode_encrypted_fname(d_inode(parent),
- cur, buf);
+ len = ceph_encode_encrypted_dname(d_inode(parent),
+ buf, len);
if (len < 0) {
dput(parent);
dput(cur);
@@ -2808,24 +2808,35 @@ retry:
if (pos < 0) {
/*
- * A rename didn't occur, but somehow we didn't end up where
- * we thought we would. Throw a warning and try again.
+ * The path is longer than PATH_MAX and this function
+ * cannot ever succeed. Creating paths that long is
+ * possible with Ceph, but Linux cannot use them.
*/
- pr_warn_client(cl, "did not end path lookup where expected (pos = %d)\n",
- pos);
- goto retry;
+ return ERR_PTR(-ENAMETOOLONG);
}
- *pbase = base;
- *plen = PATH_MAX - 1 - pos;
+ /* Initialize the output structure */
+ memset(path_info, 0, sizeof(*path_info));
+
+ path_info->vino.ino = base;
+ path_info->pathlen = PATH_MAX - 1 - pos;
+ path_info->path = path + pos;
+ path_info->freepath = true;
+
+ /* Set snap from dentry if available */
+ if (d_inode(dentry))
+ path_info->vino.snap = ceph_snap(d_inode(dentry));
+ else
+ path_info->vino.snap = CEPH_NOSNAP;
+
doutc(cl, "on %p %d built %llx '%.*s'\n", dentry, d_count(dentry),
- base, *plen, path + pos);
+ base, PATH_MAX - 1 - pos, path + pos);
return path + pos;
}
static int build_dentry_path(struct ceph_mds_client *mdsc, struct dentry *dentry,
- struct inode *dir, const char **ppath, int *ppathlen,
- u64 *pino, bool *pfreepath, bool parent_locked)
+ struct inode *dir, struct ceph_path_info *path_info,
+ bool parent_locked)
{
char *path;
@@ -2834,41 +2845,47 @@ static int build_dentry_path(struct ceph_mds_client *mdsc, struct dentry *dentry
dir = d_inode_rcu(dentry->d_parent);
if (dir && parent_locked && ceph_snap(dir) == CEPH_NOSNAP &&
!IS_ENCRYPTED(dir)) {
- *pino = ceph_ino(dir);
+ path_info->vino.ino = ceph_ino(dir);
+ path_info->vino.snap = ceph_snap(dir);
rcu_read_unlock();
- *ppath = dentry->d_name.name;
- *ppathlen = dentry->d_name.len;
+ path_info->path = dentry->d_name.name;
+ path_info->pathlen = dentry->d_name.len;
+ path_info->freepath = false;
return 0;
}
rcu_read_unlock();
- path = ceph_mdsc_build_path(mdsc, dentry, ppathlen, pino, 1);
+ path = ceph_mdsc_build_path(mdsc, dentry, path_info, 1);
if (IS_ERR(path))
return PTR_ERR(path);
- *ppath = path;
- *pfreepath = true;
+ /*
+ * ceph_mdsc_build_path already fills path_info, including snap handling.
+ */
return 0;
}
-static int build_inode_path(struct inode *inode,
- const char **ppath, int *ppathlen, u64 *pino,
- bool *pfreepath)
+static int build_inode_path(struct inode *inode, struct ceph_path_info *path_info)
{
struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
struct dentry *dentry;
char *path;
if (ceph_snap(inode) == CEPH_NOSNAP) {
- *pino = ceph_ino(inode);
- *ppathlen = 0;
+ path_info->vino.ino = ceph_ino(inode);
+ path_info->vino.snap = ceph_snap(inode);
+ path_info->pathlen = 0;
+ path_info->freepath = false;
return 0;
}
dentry = d_find_alias(inode);
- path = ceph_mdsc_build_path(mdsc, dentry, ppathlen, pino, 1);
+ path = ceph_mdsc_build_path(mdsc, dentry, path_info, 1);
dput(dentry);
if (IS_ERR(path))
return PTR_ERR(path);
- *ppath = path;
- *pfreepath = true;
+ /*
+ * ceph_mdsc_build_path already fills path_info, including snap from dentry.
+ * Override with inode's snap since that's what this function is for.
+ */
+ path_info->vino.snap = ceph_snap(inode);
return 0;
}
@@ -2878,26 +2895,32 @@ static int build_inode_path(struct inode *inode,
*/
static int set_request_path_attr(struct ceph_mds_client *mdsc, struct inode *rinode,
struct dentry *rdentry, struct inode *rdiri,
- const char *rpath, u64 rino, const char **ppath,
- int *pathlen, u64 *ino, bool *freepath,
+ const char *rpath, u64 rino,
+ struct ceph_path_info *path_info,
bool parent_locked)
{
struct ceph_client *cl = mdsc->fsc->client;
int r = 0;
+ /* Initialize the output structure */
+ memset(path_info, 0, sizeof(*path_info));
+
if (rinode) {
- r = build_inode_path(rinode, ppath, pathlen, ino, freepath);
+ r = build_inode_path(rinode, path_info);
doutc(cl, " inode %p %llx.%llx\n", rinode, ceph_ino(rinode),
ceph_snap(rinode));
} else if (rdentry) {
- r = build_dentry_path(mdsc, rdentry, rdiri, ppath, pathlen, ino,
- freepath, parent_locked);
- doutc(cl, " dentry %p %llx/%.*s\n", rdentry, *ino, *pathlen, *ppath);
+ r = build_dentry_path(mdsc, rdentry, rdiri, path_info, parent_locked);
+ doutc(cl, " dentry %p %llx/%.*s\n", rdentry, path_info->vino.ino,
+ path_info->pathlen, path_info->path);
} else if (rpath || rino) {
- *ino = rino;
- *ppath = rpath;
- *pathlen = rpath ? strlen(rpath) : 0;
- doutc(cl, " path %.*s\n", *pathlen, rpath);
+ path_info->vino.ino = rino;
+ path_info->vino.snap = CEPH_NOSNAP;
+ path_info->path = rpath;
+ path_info->pathlen = rpath ? strlen(rpath) : 0;
+ path_info->freepath = false;
+
+ doutc(cl, " path %.*s\n", path_info->pathlen, rpath);
}
return r;
@@ -2954,12 +2977,12 @@ static struct ceph_mds_request_head_legacy *
find_legacy_request_head(void *p, u64 features)
{
bool legacy = !(features & CEPH_FEATURE_FS_BTIME);
- struct ceph_mds_request_head_old *ohead;
+ struct ceph_mds_request_head *head;
if (legacy)
return (struct ceph_mds_request_head_legacy *)p;
- ohead = (struct ceph_mds_request_head_old *)p;
- return (struct ceph_mds_request_head_legacy *)&ohead->oldest_client_tid;
+ head = (struct ceph_mds_request_head *)p;
+ return (struct ceph_mds_request_head_legacy *)&head->oldest_client_tid;
}
/*
@@ -2974,11 +2997,8 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
struct ceph_client *cl = mdsc->fsc->client;
struct ceph_msg *msg;
struct ceph_mds_request_head_legacy *lhead;
- const char *path1 = NULL;
- const char *path2 = NULL;
- u64 ino1 = 0, ino2 = 0;
- int pathlen1 = 0, pathlen2 = 0;
- bool freepath1 = false, freepath2 = false;
+ struct ceph_path_info path_info1 = {0};
+ struct ceph_path_info path_info2 = {0};
struct dentry *old_dentry = NULL;
int len;
u16 releases;
@@ -2988,25 +3008,49 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
u16 request_head_version = mds_supported_head_version(session);
kuid_t caller_fsuid = req->r_cred->fsuid;
kgid_t caller_fsgid = req->r_cred->fsgid;
+ bool parent_locked = test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
ret = set_request_path_attr(mdsc, req->r_inode, req->r_dentry,
- req->r_parent, req->r_path1, req->r_ino1.ino,
- &path1, &pathlen1, &ino1, &freepath1,
- test_bit(CEPH_MDS_R_PARENT_LOCKED,
- &req->r_req_flags));
+ req->r_parent, req->r_path1, req->r_ino1.ino,
+ &path_info1, parent_locked);
if (ret < 0) {
msg = ERR_PTR(ret);
goto out;
}
+ /*
+ * When the parent directory's i_rwsem is *not* locked, req->r_parent may
+ * have become stale (e.g. after a concurrent rename) between the time the
+ * dentry was looked up and now. If we detect that the stored r_parent
+ * does not match the inode number we just encoded for the request, switch
+ * to the correct inode so that the MDS receives a valid parent reference.
+ */
+ if (!parent_locked && req->r_parent && path_info1.vino.ino &&
+ ceph_ino(req->r_parent) != path_info1.vino.ino) {
+ struct inode *old_parent = req->r_parent;
+ struct inode *correct_dir = ceph_get_inode(mdsc->fsc->sb, path_info1.vino, NULL);
+ if (!IS_ERR(correct_dir)) {
+ WARN_ONCE(1, "ceph: r_parent mismatch (had %llx wanted %llx) - updating\n",
+ ceph_ino(old_parent), path_info1.vino.ino);
+ /*
+ * Transfer CEPH_CAP_PIN from the old parent to the new one.
+ * The pin was taken earlier in ceph_mdsc_submit_request().
+ */
+ ceph_put_cap_refs(ceph_inode(old_parent), CEPH_CAP_PIN);
+ iput(old_parent);
+ req->r_parent = correct_dir;
+ ceph_get_cap_refs(ceph_inode(req->r_parent), CEPH_CAP_PIN);
+ }
+ }
+
/* If r_old_dentry is set, then assume that its parent is locked */
if (req->r_old_dentry &&
!(req->r_old_dentry->d_flags & DCACHE_DISCONNECTED))
old_dentry = req->r_old_dentry;
ret = set_request_path_attr(mdsc, NULL, old_dentry,
- req->r_old_dentry_dir,
- req->r_path2, req->r_ino2.ino,
- &path2, &pathlen2, &ino2, &freepath2, true);
+ req->r_old_dentry_dir,
+ req->r_path2, req->r_ino2.ino,
+ &path_info2, true);
if (ret < 0) {
msg = ERR_PTR(ret);
goto out_free1;
@@ -3029,7 +3073,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
if (legacy)
len = sizeof(struct ceph_mds_request_head_legacy);
else if (request_head_version == 1)
- len = sizeof(struct ceph_mds_request_head_old);
+ len = offsetofend(struct ceph_mds_request_head, args);
else if (request_head_version == 2)
len = offsetofend(struct ceph_mds_request_head, ext_num_fwd);
else
@@ -3037,7 +3081,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
/* filepaths */
len += 2 * (1 + sizeof(u32) + sizeof(u64));
- len += pathlen1 + pathlen2;
+ len += path_info1.pathlen + path_info2.pathlen;
/* cap releases */
len += sizeof(struct ceph_mds_request_release) *
@@ -3045,9 +3089,9 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
!!req->r_old_inode_drop + !!req->r_old_dentry_drop);
if (req->r_dentry_drop)
- len += pathlen1;
+ len += path_info1.pathlen;
if (req->r_old_dentry_drop)
- len += pathlen2;
+ len += path_info2.pathlen;
/* MClientRequest tail */
@@ -3113,11 +3157,11 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
msg->hdr.version = cpu_to_le16(3);
p = msg->front.iov_base + sizeof(*lhead);
} else if (request_head_version == 1) {
- struct ceph_mds_request_head_old *ohead = msg->front.iov_base;
+ struct ceph_mds_request_head *nhead = msg->front.iov_base;
msg->hdr.version = cpu_to_le16(4);
- ohead->version = cpu_to_le16(1);
- p = msg->front.iov_base + sizeof(*ohead);
+ nhead->version = cpu_to_le16(1);
+ p = msg->front.iov_base + offsetofend(struct ceph_mds_request_head, args);
} else if (request_head_version == 2) {
struct ceph_mds_request_head *nhead = msg->front.iov_base;
@@ -3160,8 +3204,8 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
lhead->ino = cpu_to_le64(req->r_deleg_ino);
lhead->args = req->r_args;
- ceph_encode_filepath(&p, end, ino1, path1);
- ceph_encode_filepath(&p, end, ino2, path2);
+ ceph_encode_filepath(&p, end, path_info1.vino.ino, path_info1.path);
+ ceph_encode_filepath(&p, end, path_info2.vino.ino, path_info2.path);
/* make note of release offset, in case we need to replay */
req->r_request_release_offset = p - msg->front.iov_base;
@@ -3224,11 +3268,9 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
msg->hdr.data_off = cpu_to_le16(0);
out_free2:
- if (freepath2)
- ceph_mdsc_free_path((char *)path2, pathlen2);
+ ceph_mdsc_free_path_info(&path_info2);
out_free1:
- if (freepath1)
- ceph_mdsc_free_path((char *)path1, pathlen1);
+ ceph_mdsc_free_path_info(&path_info1);
out:
return msg;
out_err:
@@ -3269,12 +3311,12 @@ static int __prepare_send_request(struct ceph_mds_session *session,
&session->s_features);
/*
- * Avoid inifinite retrying after overflow. The client will
+ * Avoid infinite retrying after overflow. The client will
* increase the retry count and if the MDS is old version,
* so we limit to retry at most 256 times.
*/
if (req->r_attempts) {
- old_max_retry = sizeof_field(struct ceph_mds_request_head_old,
+ old_max_retry = sizeof_field(struct ceph_mds_request_head,
num_retry);
old_max_retry = 1 << (old_max_retry * BITS_PER_BYTE);
if ((old_version && req->r_attempts >= old_max_retry) ||
@@ -3522,7 +3564,7 @@ static void __do_request(struct ceph_mds_client *mdsc,
/*
* For async create we will choose the auth MDS of frag in parent
- * directory to send the request and ususally this works fine, but
+ * directory to send the request and usually this works fine, but
* if the migrated the dirtory to another MDS before it could handle
* it the request will be forwarded.
*
@@ -4033,7 +4075,7 @@ static void handle_forward(struct ceph_mds_client *mdsc,
__unregister_request(mdsc, req);
} else if (fwd_seq <= req->r_num_fwd || (uint32_t)fwd_seq >= U32_MAX) {
/*
- * Avoid inifinite retrying after overflow.
+ * Avoid infinite retrying after overflow.
*
* The MDS will increase the fwd count and in client side
* if the num_fwd is less than the one saved in request
@@ -4585,24 +4627,20 @@ static int reconnect_caps_cb(struct inode *inode, int mds, void *arg)
struct ceph_pagelist *pagelist = recon_state->pagelist;
struct dentry *dentry;
struct ceph_cap *cap;
- char *path;
- int pathlen = 0, err;
- u64 pathbase;
+ struct ceph_path_info path_info = {0};
+ int err;
u64 snap_follows;
dentry = d_find_primary(inode);
if (dentry) {
/* set pathbase to parent dir when msg_version >= 2 */
- path = ceph_mdsc_build_path(mdsc, dentry, &pathlen, &pathbase,
+ char *path = ceph_mdsc_build_path(mdsc, dentry, &path_info,
recon_state->msg_version >= 2);
dput(dentry);
if (IS_ERR(path)) {
err = PTR_ERR(path);
goto out_err;
}
- } else {
- path = NULL;
- pathbase = 0;
}
spin_lock(&ci->i_ceph_lock);
@@ -4635,7 +4673,7 @@ static int reconnect_caps_cb(struct inode *inode, int mds, void *arg)
rec.v2.wanted = cpu_to_le32(__ceph_caps_wanted(ci));
rec.v2.issued = cpu_to_le32(cap->issued);
rec.v2.snaprealm = cpu_to_le64(ci->i_snap_realm->ino);
- rec.v2.pathbase = cpu_to_le64(pathbase);
+ rec.v2.pathbase = cpu_to_le64(path_info.vino.ino);
rec.v2.flock_len = (__force __le32)
((ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) ? 0 : 1);
} else {
@@ -4650,7 +4688,7 @@ static int reconnect_caps_cb(struct inode *inode, int mds, void *arg)
ts = inode_get_atime(inode);
ceph_encode_timespec64(&rec.v1.atime, &ts);
rec.v1.snaprealm = cpu_to_le64(ci->i_snap_realm->ino);
- rec.v1.pathbase = cpu_to_le64(pathbase);
+ rec.v1.pathbase = cpu_to_le64(path_info.vino.ino);
}
if (list_empty(&ci->i_cap_snaps)) {
@@ -4712,7 +4750,7 @@ encode_again:
sizeof(struct ceph_filelock);
rec.v2.flock_len = cpu_to_le32(struct_len);
- struct_len += sizeof(u32) + pathlen + sizeof(rec.v2);
+ struct_len += sizeof(u32) + path_info.pathlen + sizeof(rec.v2);
if (struct_v >= 2)
struct_len += sizeof(u64); /* snap_follows */
@@ -4736,7 +4774,7 @@ encode_again:
ceph_pagelist_encode_8(pagelist, 1);
ceph_pagelist_encode_32(pagelist, struct_len);
}
- ceph_pagelist_encode_string(pagelist, path, pathlen);
+ ceph_pagelist_encode_string(pagelist, (char *)path_info.path, path_info.pathlen);
ceph_pagelist_append(pagelist, &rec, sizeof(rec.v2));
ceph_locks_to_pagelist(flocks, pagelist,
num_fcntl_locks, num_flock_locks);
@@ -4747,17 +4785,17 @@ out_freeflocks:
} else {
err = ceph_pagelist_reserve(pagelist,
sizeof(u64) + sizeof(u32) +
- pathlen + sizeof(rec.v1));
+ path_info.pathlen + sizeof(rec.v1));
if (err)
goto out_err;
ceph_pagelist_encode_64(pagelist, ceph_ino(inode));
- ceph_pagelist_encode_string(pagelist, path, pathlen);
+ ceph_pagelist_encode_string(pagelist, (char *)path_info.path, path_info.pathlen);
ceph_pagelist_append(pagelist, &rec, sizeof(rec.v1));
}
out_err:
- ceph_mdsc_free_path(path, pathlen);
+ ceph_mdsc_free_path_info(&path_info);
if (!err)
recon_state->nr_caps++;
return err;
@@ -5495,6 +5533,8 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
spin_lock_init(&mdsc->stopping_lock);
atomic_set(&mdsc->stopping_blockers, 0);
init_completion(&mdsc->stopping_waiter);
+ atomic64_set(&mdsc->dirty_folios, 0);
+ init_waitqueue_head(&mdsc->flush_end_wq);
init_waitqueue_head(&mdsc->session_close_wq);
INIT_LIST_HEAD(&mdsc->waiting_for_map);
mdsc->quotarealms_inodes = RB_ROOT;
@@ -5609,17 +5649,25 @@ void send_flush_mdlog(struct ceph_mds_session *s)
static int ceph_mds_auth_match(struct ceph_mds_client *mdsc,
struct ceph_mds_cap_auth *auth,
+ const struct cred *cred,
char *tpath)
{
- const struct cred *cred = get_current_cred();
u32 caller_uid = from_kuid(&init_user_ns, cred->fsuid);
u32 caller_gid = from_kgid(&init_user_ns, cred->fsgid);
struct ceph_client *cl = mdsc->fsc->client;
+ const char *fs_name = mdsc->fsc->mount_options->mds_namespace;
const char *spath = mdsc->fsc->mount_options->server_path;
bool gid_matched = false;
u32 gid, tlen, len;
int i, j;
+ doutc(cl, "fsname check fs_name=%s match.fs_name=%s\n",
+ fs_name, auth->match.fs_name ? auth->match.fs_name : "");
+ if (auth->match.fs_name && strcmp(auth->match.fs_name, fs_name)) {
+ /* fsname mismatch, try next one */
+ return 0;
+ }
+
doutc(cl, "match.uid %lld\n", auth->match.uid);
if (auth->match.uid != MDS_AUTH_UID_ANY) {
if (auth->match.uid != caller_uid)
@@ -5699,18 +5747,18 @@ static int ceph_mds_auth_match(struct ceph_mds_client *mdsc,
*
* All the other cases --> mismatch
*/
+ bool path_matched = true;
char *first = strstr(_tpath, auth->match.path);
- if (first != _tpath) {
- if (free_tpath)
- kfree(_tpath);
- return 0;
+ if (first != _tpath ||
+ (tlen > len && _tpath[len] != '/')) {
+ path_matched = false;
}
- if (tlen > len && _tpath[len] != '/') {
- if (free_tpath)
- kfree(_tpath);
+ if (free_tpath)
+ kfree(_tpath);
+
+ if (!path_matched)
return 0;
- }
}
}
@@ -5734,11 +5782,12 @@ int ceph_mds_check_access(struct ceph_mds_client *mdsc, char *tpath, int mask)
for (i = 0; i < mdsc->s_cap_auths_num; i++) {
struct ceph_mds_cap_auth *s = &mdsc->s_cap_auths[i];
- err = ceph_mds_auth_match(mdsc, s, tpath);
+ err = ceph_mds_auth_match(mdsc, s, cred, tpath);
if (err < 0) {
+ put_cred(cred);
return err;
} else if (err > 0) {
- /* always follow the last auth caps' permision */
+ /* always follow the last auth caps' permission */
root_squash_perms = true;
rw_perms_s = NULL;
if ((mask & MAY_WRITE) && s->writeable &&
@@ -5751,6 +5800,8 @@ int ceph_mds_check_access(struct ceph_mds_client *mdsc, char *tpath, int mask)
}
}
+ put_cred(cred);
+
doutc(cl, "root_squash_perms %d, rw_perms_s %p\n", root_squash_perms,
rw_perms_s);
if (root_squash_perms && rw_perms_s == NULL) {
generated by cgit (git 2.34.1) at 2025-12-24 23:17:35 +0000