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authorJiri Kosina <jkosina@suse.cz>2013-01-29 10:48:30 +0100
committerJiri Kosina <jkosina@suse.cz>2013-01-29 10:48:30 +0100
commit617677295b53a40d0e54aac4cbbc216ffbc755dd (patch)
tree51b9e87213243ed5efff252c8e8d8fec4eebc588 /fs/cifs
parent5c8d1b68e01a144813e38795fe6dbe7ebb506131 (diff)
parent6abb7c25775b7fb2225ad0508236d63ca710e65f (diff)
downloadvexpress-lsk-617677295b53a40d0e54aac4cbbc216ffbc755dd.tar.gz
Merge branch 'master' into for-next
Conflicts: drivers/devfreq/exynos4_bus.c Sync with Linus' tree to be able to apply patches that are against newer code (mvneta).
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/Kconfig10
-rw-r--r--fs/cifs/cifs_debug.h72
-rw-r--r--fs/cifs/cifs_dfs_ref.c2
-rw-r--r--fs/cifs/cifsacl.c777
-rw-r--r--fs/cifs/cifsacl.h66
-rw-r--r--fs/cifs/cifsfs.c25
-rw-r--r--fs/cifs/cifsglob.h36
-rw-r--r--fs/cifs/cifsproto.h10
-rw-r--r--fs/cifs/connect.c313
-rw-r--r--fs/cifs/dir.c43
-rw-r--r--fs/cifs/file.c215
-rw-r--r--fs/cifs/inode.c7
-rw-r--r--fs/cifs/netmisc.c14
-rw-r--r--fs/cifs/readdir.c72
-rw-r--r--fs/cifs/smb1ops.c43
-rw-r--r--fs/cifs/smb2file.c12
-rw-r--r--fs/cifs/smb2ops.c105
-rw-r--r--fs/cifs/smb2pdu.c5
-rw-r--r--fs/cifs/smb2proto.h4
-rw-r--r--fs/cifs/smb2transport.c13
-rw-r--r--fs/cifs/transport.c6
21 files changed, 852 insertions, 998 deletions
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index 2075ddfffa7..21ff76c22a1 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -122,9 +122,17 @@ config CIFS_ACL
Allows fetching CIFS/NTFS ACL from the server. The DACL blob
is handed over to the application/caller.
+config CIFS_DEBUG
+ bool "Enable CIFS debugging routines"
+ default y
+ depends on CIFS
+ help
+ Enabling this option adds helpful debugging messages to
+ the cifs code which increases the size of the cifs module.
+ If unsure, say Y.
config CIFS_DEBUG2
bool "Enable additional CIFS debugging routines"
- depends on CIFS
+ depends on CIFS_DEBUG
help
Enabling this option adds a few more debugging routines
to the cifs code which slightly increases the size of
diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h
index c0c68bb492d..69ae3d3c3b3 100644
--- a/fs/cifs/cifs_debug.h
+++ b/fs/cifs/cifs_debug.h
@@ -18,7 +18,6 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
-#define CIFS_DEBUG /* BB temporary */
#ifndef _H_CIFS_DEBUG
#define _H_CIFS_DEBUG
@@ -37,49 +36,39 @@ void dump_smb(void *, int);
#define CIFS_RC 0x02
#define CIFS_TIMER 0x04
+extern int cifsFYI;
+
/*
* debug ON
* --------
*/
-#ifdef CIFS_DEBUG
+#ifdef CONFIG_CIFS_DEBUG
/* information message: e.g., configuration, major event */
-extern int cifsFYI;
-#define cifsfyi(fmt, arg...) \
+#define cifsfyi(fmt, ...) \
do { \
if (cifsFYI & CIFS_INFO) \
- printk(KERN_DEBUG "%s: " fmt "\n", __FILE__, ##arg); \
-} while (0)
-
-#define cFYI(set, fmt, arg...) \
-do { \
- if (set) \
- cifsfyi(fmt, ##arg); \
+ printk(KERN_DEBUG "%s: " fmt "\n", \
+ __FILE__, ##__VA_ARGS__); \
} while (0)
-#define cifswarn(fmt, arg...) \
- printk(KERN_WARNING fmt "\n", ##arg)
-
-/* debug event message: */
-extern int cifsERROR;
-
-#define cEVENT(fmt, arg...) \
+#define cFYI(set, fmt, ...) \
do { \
- if (cifsERROR) \
- printk(KERN_EVENT "%s: " fmt "\n", __FILE__, ##arg); \
+ if (set) \
+ cifsfyi(fmt, ##__VA_ARGS__); \
} while (0)
+#define cifswarn(fmt, ...) \
+ printk(KERN_WARNING fmt "\n", ##__VA_ARGS__)
+
/* error event message: e.g., i/o error */
-#define cifserror(fmt, arg...) \
-do { \
- if (cifsERROR) \
- printk(KERN_ERR "CIFS VFS: " fmt "\n", ##arg); \
-} while (0)
+#define cifserror(fmt, ...) \
+ printk(KERN_ERR "CIFS VFS: " fmt "\n", ##__VA_ARGS__); \
-#define cERROR(set, fmt, arg...) \
-do { \
- if (set) \
- cifserror(fmt, ##arg); \
+#define cERROR(set, fmt, ...) \
+do { \
+ if (set) \
+ cifserror(fmt, ##__VA_ARGS__); \
} while (0)
/*
@@ -87,10 +76,27 @@ do { \
* ---------
*/
#else /* _CIFS_DEBUG */
-#define cERROR(set, fmt, arg...)
-#define cEVENT(fmt, arg...)
-#define cFYI(set, fmt, arg...)
-#define cifserror(fmt, arg...)
+#define cifsfyi(fmt, ...) \
+do { \
+ if (0) \
+ printk(KERN_DEBUG "%s: " fmt "\n", \
+ __FILE__, ##__VA_ARGS__); \
+} while (0)
+#define cFYI(set, fmt, ...) \
+do { \
+ if (0 && set) \
+ cifsfyi(fmt, ##__VA_ARGS__); \
+} while (0)
+#define cifserror(fmt, ...) \
+do { \
+ if (0) \
+ printk(KERN_ERR "CIFS VFS: " fmt "\n", ##__VA_ARGS__); \
+} while (0)
+#define cERROR(set, fmt, ...) \
+do { \
+ if (0 && set) \
+ cifserror(fmt, ##__VA_ARGS__); \
+} while (0)
#endif /* _CIFS_DEBUG */
#endif /* _H_CIFS_DEBUG */
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index ce5cbd717bf..210fce2df30 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -226,6 +226,8 @@ compose_mount_options_out:
compose_mount_options_err:
kfree(mountdata);
mountdata = ERR_PTR(rc);
+ kfree(*devname);
+ *devname = NULL;
goto compose_mount_options_out;
}
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index fc783e26442..5cbd00e7406 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -42,135 +42,27 @@ static const struct cifs_sid sid_authusers = {
/* group users */
static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} };
-const struct cred *root_cred;
-
-static void
-shrink_idmap_tree(struct rb_root *root, int nr_to_scan, int *nr_rem,
- int *nr_del)
-{
- struct rb_node *node;
- struct rb_node *tmp;
- struct cifs_sid_id *psidid;
-
- node = rb_first(root);
- while (node) {
- tmp = node;
- node = rb_next(tmp);
- psidid = rb_entry(tmp, struct cifs_sid_id, rbnode);
- if (nr_to_scan == 0 || *nr_del == nr_to_scan)
- ++(*nr_rem);
- else {
- if (time_after(jiffies, psidid->time + SID_MAP_EXPIRE)
- && psidid->refcount == 0) {
- rb_erase(tmp, root);
- ++(*nr_del);
- } else
- ++(*nr_rem);
- }
- }
-}
-
-/*
- * Run idmap cache shrinker.
- */
-static int
-cifs_idmap_shrinker(struct shrinker *shrink, struct shrink_control *sc)
-{
- int nr_to_scan = sc->nr_to_scan;
- int nr_del = 0;
- int nr_rem = 0;
- struct rb_root *root;
-
- root = &uidtree;
- spin_lock(&siduidlock);
- shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
- spin_unlock(&siduidlock);
-
- root = &gidtree;
- spin_lock(&sidgidlock);
- shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
- spin_unlock(&sidgidlock);
-
- root = &siduidtree;
- spin_lock(&uidsidlock);
- shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
- spin_unlock(&uidsidlock);
-
- root = &sidgidtree;
- spin_lock(&gidsidlock);
- shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
- spin_unlock(&gidsidlock);
-
- return nr_rem;
-}
-
-static void
-sid_rb_insert(struct rb_root *root, unsigned long cid,
- struct cifs_sid_id **psidid, char *typestr)
-{
- char *strptr;
- struct rb_node *node = root->rb_node;
- struct rb_node *parent = NULL;
- struct rb_node **linkto = &(root->rb_node);
- struct cifs_sid_id *lsidid;
-
- while (node) {
- lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
- parent = node;
- if (cid > lsidid->id) {
- linkto = &(node->rb_left);
- node = node->rb_left;
- }
- if (cid < lsidid->id) {
- linkto = &(node->rb_right);
- node = node->rb_right;
- }
- }
-
- (*psidid)->id = cid;
- (*psidid)->time = jiffies - (SID_MAP_RETRY + 1);
- (*psidid)->refcount = 0;
-
- sprintf((*psidid)->sidstr, "%s", typestr);
- strptr = (*psidid)->sidstr + strlen((*psidid)->sidstr);
- sprintf(strptr, "%ld", cid);
-
- clear_bit(SID_ID_PENDING, &(*psidid)->state);
- clear_bit(SID_ID_MAPPED, &(*psidid)->state);
-
- rb_link_node(&(*psidid)->rbnode, parent, linkto);
- rb_insert_color(&(*psidid)->rbnode, root);
-}
-
-static struct cifs_sid_id *
-sid_rb_search(struct rb_root *root, unsigned long cid)
-{
- struct rb_node *node = root->rb_node;
- struct cifs_sid_id *lsidid;
-
- while (node) {
- lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
- if (cid > lsidid->id)
- node = node->rb_left;
- else if (cid < lsidid->id)
- node = node->rb_right;
- else /* node found */
- return lsidid;
- }
-
- return NULL;
-}
-
-static struct shrinker cifs_shrinker = {
- .shrink = cifs_idmap_shrinker,
- .seeks = DEFAULT_SEEKS,
-};
+static const struct cred *root_cred;
static int
cifs_idmap_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
{
char *payload;
+ /*
+ * If the payload is less than or equal to the size of a pointer, then
+ * an allocation here is wasteful. Just copy the data directly to the
+ * payload.value union member instead.
+ *
+ * With this however, you must check the datalen before trying to
+ * dereference payload.data!
+ */
+ if (prep->datalen <= sizeof(key->payload)) {
+ key->payload.value = 0;
+ memcpy(&key->payload.value, prep->data, prep->datalen);
+ key->datalen = prep->datalen;
+ return 0;
+ }
payload = kmalloc(prep->datalen, GFP_KERNEL);
if (!payload)
return -ENOMEM;
@@ -184,10 +76,11 @@ cifs_idmap_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
static inline void
cifs_idmap_key_destroy(struct key *key)
{
- kfree(key->payload.data);
+ if (key->datalen > sizeof(key->payload))
+ kfree(key->payload.data);
}
-struct key_type cifs_idmap_key_type = {
+static struct key_type cifs_idmap_key_type = {
.name = "cifs.idmap",
.instantiate = cifs_idmap_key_instantiate,
.destroy = cifs_idmap_key_destroy,
@@ -195,214 +88,174 @@ struct key_type cifs_idmap_key_type = {
.match = user_match,
};
-static void
-sid_to_str(struct cifs_sid *sidptr, char *sidstr)
+static char *
+sid_to_key_str(struct cifs_sid *sidptr, unsigned int type)
{
- int i;
- unsigned long saval;
- char *strptr;
+ int i, len;
+ unsigned int saval;
+ char *sidstr, *strptr;
+ unsigned long long id_auth_val;
+
+ /* 3 bytes for prefix */
+ sidstr = kmalloc(3 + SID_STRING_BASE_SIZE +
+ (SID_STRING_SUBAUTH_SIZE * sidptr->num_subauth),
+ GFP_KERNEL);
+ if (!sidstr)
+ return sidstr;
strptr = sidstr;
+ len = sprintf(strptr, "%cs:S-%hhu", type == SIDOWNER ? 'o' : 'g',
+ sidptr->revision);
+ strptr += len;
+
+ /* The authority field is a single 48-bit number */
+ id_auth_val = (unsigned long long)sidptr->authority[5];
+ id_auth_val |= (unsigned long long)sidptr->authority[4] << 8;
+ id_auth_val |= (unsigned long long)sidptr->authority[3] << 16;
+ id_auth_val |= (unsigned long long)sidptr->authority[2] << 24;
+ id_auth_val |= (unsigned long long)sidptr->authority[1] << 32;
+ id_auth_val |= (unsigned long long)sidptr->authority[0] << 48;
- sprintf(strptr, "%s", "S");
- strptr = sidstr + strlen(sidstr);
-
- sprintf(strptr, "-%d", sidptr->revision);
- strptr = sidstr + strlen(sidstr);
+ /*
+ * MS-DTYP states that if the authority is >= 2^32, then it should be
+ * expressed as a hex value.
+ */
+ if (id_auth_val <= UINT_MAX)
+ len = sprintf(strptr, "-%llu", id_auth_val);
+ else
+ len = sprintf(strptr, "-0x%llx", id_auth_val);
- for (i = 0; i < 6; ++i) {
- if (sidptr->authority[i]) {
- sprintf(strptr, "-%d", sidptr->authority[i]);
- strptr = sidstr + strlen(sidstr);
- }
- }
+ strptr += len;
for (i = 0; i < sidptr->num_subauth; ++i) {
saval = le32_to_cpu(sidptr->sub_auth[i]);
- sprintf(strptr, "-%ld", saval);
- strptr = sidstr + strlen(sidstr);
+ len = sprintf(strptr, "-%u", saval);
+ strptr += len;
}
+
+ return sidstr;
}
-static void
-id_rb_insert(struct rb_root *root, struct cifs_sid *sidptr,
- struct cifs_sid_id **psidid, char *typestr)
+/*
+ * if the two SIDs (roughly equivalent to a UUID for a user or group) are
+ * the same returns zero, if they do not match returns non-zero.
+ */
+static int
+compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
{
- int rc;
- char *strptr;
- struct rb_node *node = root->rb_node;
- struct rb_node *parent = NULL;
- struct rb_node **linkto = &(root->rb_node);
- struct cifs_sid_id *lsidid;
-
- while (node) {
- lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
- parent = node;
- rc = compare_sids(sidptr, &((lsidid)->sid));
- if (rc > 0) {
- linkto = &(node->rb_left);
- node = node->rb_left;
- } else if (rc < 0) {
- linkto = &(node->rb_right);
- node = node->rb_right;
- }
- }
-
- memcpy(&(*psidid)->sid, sidptr, sizeof(struct cifs_sid));
- (*psidid)->time = jiffies - (SID_MAP_RETRY + 1);
- (*psidid)->refcount = 0;
+ int i;
+ int num_subauth, num_sat, num_saw;
- sprintf((*psidid)->sidstr, "%s", typestr);
- strptr = (*psidid)->sidstr + strlen((*psidid)->sidstr);
- sid_to_str(&(*psidid)->sid, strptr);
+ if ((!ctsid) || (!cwsid))
+ return 1;
- clear_bit(SID_ID_PENDING, &(*psidid)->state);
- clear_bit(SID_ID_MAPPED, &(*psidid)->state);
+ /* compare the revision */
+ if (ctsid->revision != cwsid->revision) {
+ if (ctsid->revision > cwsid->revision)
+ return 1;
+ else
+ return -1;
+ }
- rb_link_node(&(*psidid)->rbnode, parent, linkto);
- rb_insert_color(&(*psidid)->rbnode, root);
-}
+ /* compare all of the six auth values */
+ for (i = 0; i < NUM_AUTHS; ++i) {
+ if (ctsid->authority[i] != cwsid->authority[i]) {
+ if (ctsid->authority[i] > cwsid->authority[i])
+ return 1;
+ else
+ return -1;
+ }
+ }
-static struct cifs_sid_id *
-id_rb_search(struct rb_root *root, struct cifs_sid *sidptr)
-{
- int rc;
- struct rb_node *node = root->rb_node;
- struct cifs_sid_id *lsidid;
-
- while (node) {
- lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
- rc = compare_sids(sidptr, &((lsidid)->sid));
- if (rc > 0) {
- node = node->rb_left;
- } else if (rc < 0) {
- node = node->rb_right;
- } else /* node found */
- return lsidid;
+ /* compare all of the subauth values if any */
+ num_sat = ctsid->num_subauth;
+ num_saw = cwsid->num_subauth;
+ num_subauth = num_sat < num_saw ? num_sat : num_saw;
+ if (num_subauth) {
+ for (i = 0; i < num_subauth; ++i) {
+ if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) {
+ if (le32_to_cpu(ctsid->sub_auth[i]) >
+ le32_to_cpu(cwsid->sub_auth[i]))
+ return 1;
+ else
+ return -1;
+ }
+ }
}
- return NULL;
+ return 0; /* sids compare/match */
}
-static int
-sidid_pending_wait(void *unused)
+static void
+cifs_copy_sid(struct cifs_sid *dst, const struct cifs_sid *src)
{
- schedule();
- return signal_pending(current) ? -ERESTARTSYS : 0;
+ int i;
+
+ dst->revision = src->revision;
+ dst->num_subauth = min_t(u8, src->num_subauth, SID_MAX_SUB_AUTHORITIES);
+ for (i = 0; i < NUM_AUTHS; ++i)
+ dst->authority[i] = src->authority[i];
+ for (i = 0; i < dst->num_subauth; ++i)
+ dst->sub_auth[i] = src->sub_auth[i];
}
static int
-id_to_sid(unsigned long cid, uint sidtype, struct cifs_sid *ssid)
+id_to_sid(unsigned int cid, uint sidtype, struct cifs_sid *ssid)
{
- int rc = 0;
+ int rc;
struct key *sidkey;
+ struct cifs_sid *ksid;
+ unsigned int ksid_size;
+ char desc[3 + 10 + 1]; /* 3 byte prefix + 10 bytes for value + NULL */
const struct cred *saved_cred;
- struct cifs_sid *lsid;
- struct cifs_sid_id *psidid, *npsidid;
- struct rb_root *cidtree;
- spinlock_t *cidlock;
-
- if (sidtype == SIDOWNER) {
- cidlock = &siduidlock;
- cidtree = &uidtree;
- } else if (sidtype == SIDGROUP) {
- cidlock = &sidgidlock;
- cidtree = &gidtree;
- } else
- return -EINVAL;
-
- spin_lock(cidlock);
- psidid = sid_rb_search(cidtree, cid);
-
- if (!psidid) { /* node does not exist, allocate one & attempt adding */
- spin_unlock(cidlock);
- npsidid = kzalloc(sizeof(struct cifs_sid_id), GFP_KERNEL);
- if (!npsidid)
- return -ENOMEM;
- npsidid->sidstr = kmalloc(SIDLEN, GFP_KERNEL);
- if (!npsidid->sidstr) {
- kfree(npsidid);
- return -ENOMEM;
- }
+ rc = snprintf(desc, sizeof(desc), "%ci:%u",
+ sidtype == SIDOWNER ? 'o' : 'g', cid);
+ if (rc >= sizeof(desc))
+ return -EINVAL;
- spin_lock(cidlock);
- psidid = sid_rb_search(cidtree, cid);
- if (psidid) { /* node happened to get inserted meanwhile */
- ++psidid->refcount;
- spin_unlock(cidlock);
- kfree(npsidid->sidstr);
- kfree(npsidid);
- } else {
- psidid = npsidid;
- sid_rb_insert(cidtree, cid, &psidid,
- sidtype == SIDOWNER ? "oi:" : "gi:");
- ++psidid->refcount;
- spin_unlock(cidlock);
- }
- } else {
- ++psidid->refcount;
- spin_unlock(cidlock);
+ rc = 0;
+ saved_cred = override_creds(root_cred);
+ sidkey = request_key(&cifs_idmap_key_type, desc, "");
+ if (IS_ERR(sidkey)) {
+ rc = -EINVAL;
+ cFYI(1, "%s: Can't map %cid %u to a SID", __func__,
+ sidtype == SIDOWNER ? 'u' : 'g', cid);
+ goto out_revert_creds;
+ } else if (sidkey->datalen < CIFS_SID_BASE_SIZE) {
+ rc = -EIO;
+ cFYI(1, "%s: Downcall contained malformed key "
+ "(datalen=%hu)", __func__, sidkey->datalen);
+ goto invalidate_key;
}
/*
- * If we are here, it is safe to access psidid and its fields
- * since a reference was taken earlier while holding the spinlock.
- * A reference on the node is put without holding the spinlock
- * and it is OK to do so in this case, shrinker will not erase
- * this node until all references are put and we do not access
- * any fields of the node after a reference is put .
+ * A sid is usually too large to be embedded in payload.value, but if
+ * there are no subauthorities and the host has 8-byte pointers, then
+ * it could be.
*/
- if (test_bit(SID_ID_MAPPED, &psidid->state)) {
- memcpy(ssid, &psidid->sid, sizeof(struct cifs_sid));
- psidid->time = jiffies; /* update ts for accessing */
- goto id_sid_out;
- }
-
- if (time_after(psidid->time + SID_MAP_RETRY, jiffies)) {
- rc = -EINVAL;
- goto id_sid_out;
+ ksid = sidkey->datalen <= sizeof(sidkey->payload) ?
+ (struct cifs_sid *)&sidkey->payload.value :
+ (struct cifs_sid *)sidkey->payload.data;
+
+ ksid_size = CIFS_SID_BASE_SIZE + (ksid->num_subauth * sizeof(__le32));
+ if (ksid_size > sidkey->datalen) {
+ rc = -EIO;
+ cFYI(1, "%s: Downcall contained malformed key (datalen=%hu, "
+ "ksid_size=%u)", __func__, sidkey->datalen, ksid_size);
+ goto invalidate_key;
}
- if (!test_and_set_bit(SID_ID_PENDING, &psidid->state)) {
- saved_cred = override_creds(root_cred);
- sidkey = request_key(&cifs_idmap_key_type, psidid->sidstr, "");
- if (IS_ERR(sidkey)) {
- rc = -EINVAL;
- cFYI(1, "%s: Can't map and id to a SID", __func__);
- } else {
- lsid = (struct cifs_sid *)sidkey->payload.data;
- memcpy(&psidid->sid, lsid,
- sidkey->datalen < sizeof(struct cifs_sid) ?
- sidkey->datalen : sizeof(struct cifs_sid));
- memcpy(ssid, &psidid->sid,
- sidkey->datalen < sizeof(struct cifs_sid) ?
- sidkey->datalen : sizeof(struct cifs_sid));
- set_bit(SID_ID_MAPPED, &psidid->state);
- key_put(sidkey);
- kfree(psidid->sidstr);
- }
- psidid->time = jiffies; /* update ts for accessing */
- revert_creds(saved_cred);
- clear_bit(SID_ID_PENDING, &psidid->state);
- wake_up_bit(&psidid->state, SID_ID_PENDING);
- } else {
- rc = wait_on_bit(&psidid->state, SID_ID_PENDING,
- sidid_pending_wait, TASK_INTERRUPTIBLE);
- if (rc) {
- cFYI(1, "%s: sidid_pending_wait interrupted %d",
- __func__, rc);
- --psidid->refcount;
- return rc;
- }
- if (test_bit(SID_ID_MAPPED, &psidid->state))
- memcpy(ssid, &psidid->sid, sizeof(struct cifs_sid));
- else
- rc = -EINVAL;
- }
-id_sid_out:
- --psidid->refcount;
+ cifs_copy_sid(ssid, ksid);
+out_key_put:
+ key_put(sidkey);
+out_revert_creds:
+ revert_creds(saved_cred);
return rc;
+
+invalidate_key:
+ key_invalidate(sidkey);
+ goto out_key_put;
}
static int
@@ -410,111 +263,67 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
struct cifs_fattr *fattr, uint sidtype)
{
int rc;
- unsigned long cid;
- struct key *idkey;
+ struct key *sidkey;
+ char *sidstr;
const struct cred *saved_cred;
- struct cifs_sid_id *psidid, *npsidid;
- struct rb_root *cidtree;
- spinlock_t *cidlock;
-
- if (sidtype == SIDOWNER) {
- cid = cifs_sb->mnt_uid; /* default uid, in case upcall fails */
- cidlock = &siduidlock;
- cidtree = &uidtree;
- } else if (sidtype == SIDGROUP) {
- cid = cifs_sb->mnt_gid; /* default gid, in case upcall fails */
- cidlock = &sidgidlock;
- cidtree = &gidtree;
- } else
- return -ENOENT;
-
- spin_lock(cidlock);
- psidid = id_rb_search(cidtree, psid);
-
- if (!psidid) { /* node does not exist, allocate one & attempt adding */
- spin_unlock(cidlock);
- npsidid = kzalloc(sizeof(struct cifs_sid_id), GFP_KERNEL);
- if (!npsidid)
- return -ENOMEM;
-
- npsidid->sidstr = kmalloc(SIDLEN, GFP_KERNEL);
- if (!npsidid->sidstr) {
- kfree(npsidid);
- return -ENOMEM;
- }
-
- spin_lock(cidlock);
- psidid = id_rb_search(cidtree, psid);
- if (psidid) { /* node happened to get inserted meanwhile */
- ++psidid->refcount;
- spin_unlock(cidlock);
- kfree(npsidid->sidstr);
- kfree(npsidid);
- } else {
- psidid = npsidid;
- id_rb_insert(cidtree, psid, &psidid,
- sidtype == SIDOWNER ? "os:" : "gs:");
- ++psidid->refcount;
- spin_unlock(cidlock);
- }
- } else {
- ++psidid->refcount;
- spin_unlock(cidlock);
- }
+ uid_t fuid = cifs_sb->mnt_uid;
+ gid_t fgid = cifs_sb->mnt_gid;
/*
- * If we are here, it is safe to access psidid and its fields
- * since a reference was taken earlier while holding the spinlock.
- * A reference on the node is put without holding the spinlock
- * and it is OK to do so in this case, shrinker will not erase
- * this node until all references are put and we do not access
- * any fields of the node after a reference is put .
+ * If we have too many subauthorities, then something is really wrong.
+ * Just return an error.
*/
- if (test_bit(SID_ID_MAPPED, &psidid->state)) {
- cid = psidid->id;
- psidid->time = jiffies; /* update ts for accessing */
- goto sid_to_id_out;
+ if (unlikely(psid->num_subauth > SID_MAX_SUB_AUTHORITIES)) {
+ cFYI(1, "%s: %u subauthorities is too many!", __func__,
+ psid->num_subauth);
+ return -EIO;
}
- if (time_after(psidid->time + SID_MAP_RETRY, jiffies))
- goto sid_to_id_out;
-
- if (!test_and_set_bit(SID_ID_PENDING, &psidid->state)) {
- saved_cred = override_creds(root_cred);
- idkey = request_key(&cifs_idmap_key_type, psidid->sidstr, "");
- if (IS_ERR(idkey))
- cFYI(1, "%s: Can't map SID to an id", __func__);
- else {
- cid = *(unsigned long *)idkey->payload.value;
- psidid->id = cid;
- set_bit(SID_ID_MAPPED, &psidid->state);
- key_put(idkey);
- kfree(psidid->sidstr);
- }
- revert_creds(saved_cred);
- psidid->time = jiffies; /* update ts for accessing */
- clear_bit(SID_ID_PENDING, &psidid->state);
- wake_up_bit(&psidid->state, SID_ID_PENDING);
- } else {
- rc = wait_on_bit(&psidid->state, SID_ID_PENDING,
- sidid_pending_wait, TASK_INTERRUPTIBLE);
- if (rc) {
- cFYI(1, "%s: sidid_pending_wait interrupted %d",
- __func__, rc);
- --psidid->refcount; /* decremented without spinlock */
- return rc;
- }
- if (test_bit(SID_ID_MAPPED, &psidid->state))
- cid = psidid->id;
+ sidstr = sid_to_key_str(psid, sidtype);
+ if (!sidstr)
+ return -ENOMEM;
+
+ saved_cred = override_creds(root_cred);
+ sidkey = request_key(&cifs_idmap_key_type, sidstr, "");
+ if (IS_ERR(sidkey)) {
+ rc = -EINVAL;
+ cFYI(1, "%s: Can't map SID %s to a %cid", __func__, sidstr,
+ sidtype == SIDOWNER ? 'u' : 'g');
+ goto out_revert_creds;
+ }
+
+ /*
+ * FIXME: Here we assume that uid_t and gid_t are same size. It's
+ * probably a safe assumption but might be better to check based on
+ * sidtype.
+ */
+ if (sidkey->datalen != sizeof(uid_t)) {
+ rc = -EIO;
+ cFYI(1, "%s: Downcall contained malformed key "
+ "(datalen=%hu)", __func__, sidkey->datalen);
+ key_invalidate(sidkey);
+ goto out_key_put;
}
-sid_to_id_out:
- --psidid->refcount; /* decremented without spinlock */
if (sidtype == SIDOWNER)
- fattr->cf_uid = cid;
+ memcpy(&fuid, &sidkey->payload.value, sizeof(uid_t));
else
- fattr->cf_gid = cid;
+ memcpy(&fgid, &sidkey->payload.value, sizeof(gid_t));
+
+out_key_put:
+ key_put(sidkey);
+out_revert_creds:
+ revert_creds(saved_cred);
+ kfree(sidstr);
+ /*
+ * Note that we return 0 here unconditionally. If the mapping
+ * fails then we just fall back to using the mnt_uid/mnt_gid.
+ */
+ if (sidtype == SIDOWNER)
+ fattr->cf_uid = fuid;
+ else
+ fattr->cf_gid = fgid;
return 0;
}
@@ -537,19 +346,15 @@ init_cifs_idmap(void)
if (!cred)
return -ENOMEM;
- keyring = key_alloc(&key_type_keyring, ".cifs_idmap", 0, 0, cred,
- (KEY_POS_ALL & ~KEY_POS_SETATTR) |
- KEY_USR_VIEW | KEY_USR_READ,
- KEY_ALLOC_NOT_IN_QUOTA);
+ keyring = keyring_alloc(".cifs_idmap", 0, 0, cred,
+ (KEY_POS_ALL & ~KEY_POS_SETATTR) |
+ KEY_USR_VIEW | KEY_USR_READ,
+ KEY_ALLOC_NOT_IN_QUOTA, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
goto failed_put_cred;
}
- ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL);
- if (ret < 0)
- goto failed_put_key;
-
ret = register_key_type(&cifs_idmap_key_type);
if (ret < 0)
goto failed_put_key;
@@ -561,17 +366,6 @@ init_cifs_idmap(void)
cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
root_cred = cred;
- spin_lock_init(&siduidlock);
- uidtree = RB_ROOT;
- spin_lock_init(&sidgidlock);
- gidtree = RB_ROOT;
-
- spin_lock_init(&uidsidlock);
- siduidtree = RB_ROOT;
- spin_lock_init(&gidsidlock);
- sidgidtree = RB_ROOT;
- register_shrinker(&cifs_shrinker);
-
cFYI(1, "cifs idmap keyring: %d", key_serial(keyring));
return 0;
@@ -588,95 +382,13 @@ exit_cifs_idmap(void)
key_revoke(root_cred->thread_keyring);
unregister_key_type(&cifs_idmap_key_type);
put_cred(root_cred);
- unregister_shrinker(&cifs_shrinker);
cFYI(1, "Unregistered %s key type", cifs_idmap_key_type.name);
}
-void
-cifs_destroy_idmaptrees(void)
-{
- struct rb_root *root;
- struct rb_node *node;
-
- root = &uidtree;
- spin_lock(&siduidlock);
- while ((node = rb_first(root)))
- rb_erase(node, root);
- spin_unlock(&siduidlock);
-
- root = &gidtree;
- spin_lock(&sidgidlock);
- while ((node = rb_first(root)))
- rb_erase(node, root);
- spin_unlock(&sidgidlock);
-
- root = &siduidtree;
- spin_lock(&uidsidlock);
- while ((node = rb_first(root)))
- rb_erase(node, root);
- spin_unlock(&uidsidlock);
-
- root = &sidgidtree;
- spin_lock(&gidsidlock);
- while ((node = rb_first(root)))
- rb_erase(node, root);
- spin_unlock(&gidsidlock);
-}
-
-/* if the two SIDs (roughly equivalent to a UUID for a user or group) are
- the same returns 1, if they do not match returns 0 */
-int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
-{
- int i;
- int num_subauth, num_sat, num_saw;
-
- if ((!ctsid) || (!cwsid))
- return 1;
-
- /* compare the revision */
- if (ctsid->revision != cwsid->revision) {
- if (ctsid->revision > cwsid->revision)
- return 1;
- else
- return -1;
- }
-
- /* compare all of the six auth values */
- for (i = 0; i < 6; ++i) {
- if (ctsid->authority[i] != cwsid->authority[i]) {
- if (ctsid->authority[i] > cwsid->authority[i])
- return 1;
- else
- return -1;
- }
- }
-
- /* compare all of the subauth values if any */
- num_sat = ctsid->num_subauth;
- num_saw = cwsid->num_subauth;
- num_subauth = num_sat < num_saw ? num_sat : num_saw;
- if (num_subauth) {
- for (i = 0; i < num_subauth; ++i) {
- if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) {
- if (le32_to_cpu(ctsid->sub_auth[i]) >
- le32_to_cpu(cwsid->sub_auth[i]))
- return 1;
- else
- return -1;
- }
- }
- }
-
- return 0; /* sids compare/match */
-}
-
-
/* copy ntsd, owner sid, and group sid from a security descriptor to another */
static void copy_sec_desc(const struct cifs_ntsd *pntsd,
struct cifs_ntsd *pnntsd, __u32 sidsoffset)
{
- int i;
-
struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
struct cifs_sid *nowner_sid_ptr, *ngroup_sid_ptr;
@@ -692,26 +404,14 @@ static void copy_sec_desc(const struct cifs_ntsd *pntsd,
owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
le32_to_cpu(pntsd->osidoffset));
nowner_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset);
-
- nowner_sid_ptr->revision = owner_sid_ptr->revision;
- nowner_sid_ptr->num_subauth = owner_sid_ptr->num_subauth;
- for (i = 0; i < 6; i++)
- nowner_sid_ptr->authority[i] = owner_sid_ptr->authority[i];
- for (i = 0; i < 5; i++)
- nowner_sid_ptr->sub_auth[i] = owner_sid_ptr->sub_auth[i];
+ cifs_copy_sid(nowner_sid_ptr, owner_sid_ptr);
/* copy group sid */
group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
le32_to_cpu(pntsd->gsidoffset));
ngroup_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset +
sizeof(struct cifs_sid));
-
- ngroup_sid_ptr->revision = group_sid_ptr->revision;
- ngroup_sid_ptr->num_subauth = group_sid_ptr->num_subauth;
- for (i = 0; i < 6; i++)
- ngroup_sid_ptr->authority[i] = group_sid_ptr->authority[i];
- for (i = 0; i < 5; i++)
- ngroup_sid_ptr->sub_auth[i] = group_sid_ptr->sub_auth[i];
+ cifs_copy_sid(ngroup_sid_ptr, group_sid_ptr);
return;
}
@@ -818,7 +518,7 @@ static __u16 fill_ace_for_sid(struct cifs_ace *pntace,
pntace->sid.revision = psid->revision;
pntace->sid.num_subauth = psid->num_subauth;
- for (i = 0; i < 6; i++)
+ for (i = 0; i < NUM_AUTHS; i++)
pntace->sid.authority[i] = psid->authority[i];
for (i = 0; i < psid->num_subauth; i++)
pntace->sid.sub_auth[i] = psid->sub_auth[i];
@@ -994,8 +694,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
return -EINVAL;
}
- if (psid->num_subauth) {
#ifdef CONFIG_CIFS_DEBUG2
+ if (psid->num_subauth) {
int i;
cFYI(1, "SID revision %d num_auth %d",
psid->revision, psid->num_subauth);
@@ -1009,8 +709,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
num auths and therefore go off the end */
cFYI(1, "RID 0x%x",
le32_to_cpu(psid->sub_auth[psid->num_subauth-1]));
-#endif
}
+#endif
return 0;
}
@@ -1120,8 +820,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
kfree(nowner_sid_ptr);
return rc;
}
- memcpy(owner_sid_ptr, nowner_sid_ptr,
- sizeof(struct cifs_sid));
+ cifs_copy_sid(owner_sid_ptr, nowner_sid_ptr);
kfree(nowner_sid_ptr);
*aclflag = CIFS_ACL_OWNER;
}
@@ -1139,8 +838,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
kfree(ngroup_sid_ptr);
return rc;
}
- memcpy(group_sid_ptr, ngroup_sid_ptr,
- sizeof(struct cifs_sid));
+ cifs_copy_sid(group_sid_ptr, ngroup_sid_ptr);
kfree(ngroup_sid_ptr);
*aclflag = CIFS_ACL_GROUP;
}
@@ -1316,42 +1014,39 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode,
/* Get the security descriptor */
pntsd = get_cifs_acl(CIFS_SB(inode->i_sb), inode, path, &secdesclen);
-
- /* Add three ACEs for owner, group, everyone getting rid of
- other ACEs as chmod disables ACEs and set the security descriptor */
-
if (IS_ERR(pntsd)) {
rc = PTR_ERR(pntsd);
cERROR(1, "%s: error %d getting sec desc", __func__, rc);
- } else {
- /* allocate memory for the smb header,
- set security descriptor request security descriptor
- parameters, and secuirty descriptor itself */
-
- secdesclen = secdesclen < DEFSECDESCLEN ?
- DEFSECDESCLEN : secdesclen;
- pnntsd = kmalloc(secdesclen, GFP_KERNEL);
- if (!pnntsd) {
- cERROR(1, "Unable to allocate security descriptor");
- kfree(pntsd);
- return -ENOMEM;
- }
+ goto out;
+ }
- rc = build_sec_desc(pntsd, pnntsd, secdesclen, nmode, uid, gid,
- &aclflag);
+ /*
+ * Add three ACEs for owner, group, everyone getting rid of other ACEs
+ * as chmod disables ACEs and set the security descriptor. Allocate
+ * memory for the smb header, set security descriptor request security
+ * descriptor parameters, and secuirty descriptor itself
+ */
+ secdesclen = max_t(u32, secdesclen, DEFAULT_SEC_DESC_LEN);
+ pnntsd = kmalloc(secdesclen, GFP_KERNEL);
+ if (!pnntsd) {
+ cERROR(1, "Unable to allocate security descriptor");
+ kfree(pntsd);
+ return -ENOMEM;
+ }
- cFYI(DBG2, "build_sec_desc rc: %d", rc);
+ rc = build_sec_desc(pntsd, pnntsd, secdesclen, nmode, uid, gid,
+ &aclflag);
- if (!rc) {
- /* Set the security descriptor */
- rc = set_cifs_acl(pnntsd, secdesclen, inode,
- path, aclflag);
- cFYI(DBG2, "set_cifs_acl rc: %d", rc);
- }
+ cFYI(DBG2, "build_sec_desc rc: %d", rc);
- kfree(pnntsd);
- kfree(pntsd);
+ if (!rc) {
+ /* Set the security descriptor */
+ rc = set_cifs_acl(pnntsd, secdesclen, inode, path, aclflag);
+ cFYI(DBG2, "set_cifs_acl rc: %d", rc);
}
+ kfree(pnntsd);
+ kfree(pntsd);
+out:
return rc;
}
diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h
index 5c902c7ce52..4f388483526 100644
--- a/fs/cifs/cifsacl.h
+++ b/fs/cifs/cifsacl.h
@@ -23,11 +23,8 @@
#define _CIFSACL_H
-#define NUM_AUTHS 6 /* number of authority fields */
-#define NUM_SUBAUTHS 5 /* number of sub authority fields */
-#define NUM_WK_SIDS 7 /* number of well known sids */
-#define SIDNAMELENGTH 20 /* long enough for the ones we care about */
-#define DEFSECDESCLEN 192 /* sec desc len contaiting a dacl with three aces */
+#define NUM_AUTHS (6) /* number of authority fields */
+#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
#define READ_BIT 0x4
#define WRITE_BIT 0x2
@@ -41,12 +38,32 @@
#define SIDOWNER 1
#define SIDGROUP 2
-#define SIDLEN 150 /* S- 1 revision- 6 authorities- max 5 sub authorities */
-#define SID_ID_MAPPED 0
-#define SID_ID_PENDING 1
-#define SID_MAP_EXPIRE (3600 * HZ) /* map entry expires after one hour */
-#define SID_MAP_RETRY (300 * HZ) /* wait 5 minutes for next attempt to map */
+/*
+ * Security Descriptor length containing DACL with 3 ACEs (one each for
+ * owner, group and world).
+ */
+#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
+ sizeof(struct cifs_acl) + \
+ (sizeof(struct cifs_ace) * 3))
+
+/*
+ * Maximum size of a string representation of a SID:
+ *
+ * The fields are unsigned values in decimal. So:
+ *
+ * u8: max 3 bytes in decimal
+ * u32: max 10 bytes in decimal
+ *
+ * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
+ *
+ * For authority field, max is when all 6 values are non-zero and it must be
+ * represented in hex. So "-0x" + 12 hex digits.
+ *
+ * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
+ */
+#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)
+#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */
struct cifs_ntsd {
__le16 revision; /* revision level */
@@ -60,10 +77,13 @@ struct cifs_ntsd {
struct cifs_sid {
__u8 revision; /* revision level */
__u8 num_subauth;
- __u8 authority[6];
- __le32 sub_auth[5]; /* sub_auth[num_subauth] */
+ __u8 authority[NUM_AUTHS];
+ __le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
} __attribute__((packed));
+/* size of a struct cifs_sid, sans sub_auth array */
+#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)
+
struct cifs_acl {
__le16 revision; /* revision level */
__le16 size;
@@ -78,26 +98,4 @@ struct cifs_ace {
struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
} __attribute__((packed));
-struct cifs_wksid {
- struct cifs_sid cifssid;
- char sidname[SIDNAMELENGTH];
-} __attribute__((packed));
-
-struct cifs_sid_id {
- unsigned int refcount; /* increment with spinlock, decrement without */
- unsigned long id;
- unsigned long time;
- unsigned long state;
- char *sidstr;
- struct rb_node rbnode;
- struct cifs_sid sid;
-};
-
-#ifdef __KERNEL__
-extern struct key_type cifs_idmap_key_type;
-extern const struct cred *root_cred;
-#endif /* KERNEL */
-
-extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *);
-
#endif /* _CIFSACL_H */
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index e7931cc55d0..de7f9168a11 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -54,7 +54,6 @@
#endif
int cifsFYI = 0;
-int cifsERROR = 1;
int traceSMB = 0;
bool enable_oplocks = true;
unsigned int linuxExtEnabled = 1;
@@ -64,24 +63,23 @@ unsigned int global_secflags = CIFSSEC_DEF;
unsigned int sign_CIFS_PDUs = 1;
static const struct super_operations cifs_super_ops;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
-module_param(CIFSMaxBufSize, int, 0);
+module_param(CIFSMaxBufSize, uint, 0);
MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
"Default: 16384 Range: 8192 to 130048");
unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
-module_param(cifs_min_rcv, int, 0);
+module_param(cifs_min_rcv, uint, 0);
MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
"1 to 64");
unsigned int cifs_min_small = 30;
-module_param(cifs_min_small, int, 0);
+module_param(cifs_min_small, uint, 0);
MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
"Range: 2 to 256");
unsigned int cifs_max_pending = CIFS_MAX_REQ;
-module_param(cifs_max_pending, int, 0444);
+module_param(cifs_max_pending, uint, 0444);
MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
"Default: 32767 Range: 2 to 32767.");
module_param(enable_oplocks, bool, 0644);
-MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
- "y/Y/1");
+MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
@@ -540,8 +538,8 @@ cifs_get_root(struct smb_vol *vol, struct super_block *sb)
char *s, *p;
char sep;
- full_path = build_path_to_root(vol, cifs_sb,
- cifs_sb_master_tcon(cifs_sb));
+ full_path = cifs_build_path_to_root(vol, cifs_sb,
+ cifs_sb_master_tcon(cifs_sb));
if (full_path == NULL)
return ERR_PTR(-ENOMEM);
@@ -695,13 +693,13 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
return written;
}
-static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
+static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
{
/*
- * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
+ * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
* the cached file length
*/
- if (origin != SEEK_SET && origin != SEEK_CUR) {
+ if (whence != SEEK_SET && whence != SEEK_CUR) {
int rc;
struct inode *inode = file->f_path.dentry->d_inode;
@@ -728,7 +726,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
if (rc < 0)
return (loff_t)rc;
}
- return generic_file_llseek(file, offset, origin);
+ return generic_file_llseek(file, offset, whence);
}
static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
@@ -1205,7 +1203,6 @@ exit_cifs(void)
unregister_filesystem(&cifs_fs_type);
cifs_dfs_release_automount_timer();
#ifdef CONFIG_CIFS_ACL
- cifs_destroy_idmaptrees();
exit_cifs_idmap();
#endif
#ifdef CONFIG_CIFS_UPCALL
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index f5af2527fc6..e6899cea1c3 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -178,6 +178,7 @@ struct smb_rqst {
enum smb_version {
Smb_1 = 1,
+ Smb_20,
Smb_21,
Smb_30,
};
@@ -280,9 +281,6 @@ struct smb_version_operations {
/* set attributes */
int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
const unsigned int);
- /* build a full path to the root of the mount */
- char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
- struct cifs_tcon *);
/* check if we can send an echo or nor */
bool (*can_echo)(struct TCP_Server_Info *);
/* send echo request */
@@ -369,6 +367,8 @@ struct smb_version_operations {
void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
/* generate new lease key */
void (*new_lease_key)(struct cifs_fid *fid);
+ int (*calc_signature)(struct smb_rqst *rqst,
+ struct TCP_Server_Info *server);
};
struct smb_version_values {
@@ -386,6 +386,7 @@ struct smb_version_values {
unsigned int cap_unix;
unsigned int cap_nt_find;
unsigned int cap_large_files;
+ unsigned int oplock_read;
};
#define HEADER_SIZE(server) (server->vals->header_size)
@@ -396,7 +397,6 @@ struct smb_vol {
char *password;
char *domainname;
char *UNC;
- char *UNCip;
char *iocharset; /* local code page for mapping to and from Unicode */
char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
@@ -444,11 +444,11 @@ struct smb_vol {
unsigned int rsize;
unsigned int wsize;
bool sockopt_tcp_nodelay:1;
- unsigned short int port;
unsigned long actimeo; /* attribute cache timeout (jiffies) */
struct smb_version_operations *ops;
struct smb_version_values *vals;
char *prepath;
+ struct sockaddr_storage dstaddr; /* destination address */
struct sockaddr_storage srcaddr; /* allow binding to a local IP */
struct nls_table *local_nls;
};
@@ -1067,30 +1067,16 @@ static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
static inline void
convert_delimiter(char *path, char delim)
{
- int i;
- char old_delim;
-
- if (path == NULL)
- return;
+ char old_delim, *pos;
if (delim == '/')
old_delim = '\\';
else
old_delim = '/';
- for (i = 0; path[i] != '\0'; i++) {
- if (path[i] == old_delim)
- path[i] = delim;
- }
-}
-
-static inline char *
-build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
- struct cifs_tcon *tcon)
-{
- if (!vol->ops->build_path_to_root)
- return NULL;
- return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
+ pos = path;
+ while ((pos = strchr(pos, old_delim)))
+ *pos = delim;
}
#ifdef CONFIG_CIFS_STATS
@@ -1362,7 +1348,7 @@ require use of the stronger protocol */
#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
-#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
+#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMSSP)
#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
/*
@@ -1506,6 +1492,6 @@ extern struct smb_version_values smb20_values;
extern struct smb_version_operations smb21_operations;
extern struct smb_version_values smb21_values;
#define SMB30_VERSION_STRING "3.0"
-/*extern struct smb_version_operations smb30_operations; */ /* not needed yet */
+extern struct smb_version_operations smb30_operations;
extern struct smb_version_values smb30_values;
#endif /* _CIFS_GLOB_H */
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 5144e9fbeb8..1988c1baa22 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -58,8 +58,10 @@ do { \
} while (0)
extern int init_cifs_idmap(void);
extern void exit_cifs_idmap(void);
-extern void cifs_destroy_idmaptrees(void);
extern char *build_path_from_dentry(struct dentry *);
+extern char *cifs_build_path_to_root(struct smb_vol *vol,
+ struct cifs_sb_info *cifs_sb,
+ struct cifs_tcon *tcon);
extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
extern char *cifs_compose_mount_options(const char *sb_mountdata,
const char *fullpath, const struct dfs_info3_param *ref,
@@ -107,9 +109,7 @@ extern unsigned int smbCalcSize(void *buf);
extern int decode_negTokenInit(unsigned char *security_blob, int length,
struct TCP_Server_Info *server);
extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len);
-extern int cifs_set_port(struct sockaddr *addr, const unsigned short int port);
-extern int cifs_fill_sockaddr(struct sockaddr *dst, const char *src, int len,
- const unsigned short int port);
+extern void cifs_set_port(struct sockaddr *addr, const unsigned short int port);
extern int map_smb_to_linux_error(char *buf, bool logErr);
extern void header_assemble(struct smb_hdr *, char /* command */ ,
const struct cifs_tcon *, int /* length of
@@ -185,7 +185,7 @@ extern void cifs_mark_open_files_invalid(struct cifs_tcon *tcon);
extern bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset,
__u64 length, __u8 type,
struct cifsLockInfo **conf_lock,
- bool rw_check);
+ int rw_check);
extern void cifs_add_pending_open(struct cifs_fid *fid,
struct tcon_link *tlink,
struct cifs_pending_open *open);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 5c670b998ff..12b3da39733 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -186,6 +186,7 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_user, "user=%s" },
{ Opt_user, "username=%s" },
{ Opt_blank_pass, "pass=" },
+ { Opt_blank_pass, "password=" },
{ Opt_pass, "pass=%s" },
{ Opt_pass, "password=%s" },
{ Opt_blank_ip, "ip=" },
@@ -274,6 +275,7 @@ static const match_table_t cifs_cacheflavor_tokens = {
static const match_table_t cifs_smb_version_tokens = {
{ Smb_1, SMB1_VERSION_STRING },
+ { Smb_20, SMB20_VERSION_STRING},
{ Smb_21, SMB21_VERSION_STRING },
{ Smb_30, SMB30_VERSION_STRING },
};
@@ -1074,12 +1076,16 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
vol->vals = &smb1_values;
break;
#ifdef CONFIG_CIFS_SMB2
+ case Smb_20:
+ vol->ops = &smb21_operations; /* currently identical with 2.1 */
+ vol->vals = &smb20_values;
+ break;
case Smb_21:
vol->ops = &smb21_operations;
vol->vals = &smb21_values;
break;
case Smb_30:
- vol->ops = &smb21_operations; /* currently identical with 2.1 */
+ vol->ops = &smb30_operations;
vol->vals = &smb30_values;
break;
#endif
@@ -1090,6 +1096,52 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
return 0;
}
+/*
+ * Parse a devname into substrings and populate the vol->UNC and vol->prepath
+ * fields with the result. Returns 0 on success and an error otherwise.
+ */
+static int
+cifs_parse_devname(const char *devname, struct smb_vol *vol)
+{
+ char *pos;
+ const char *delims = "/\\";
+ size_t len;
+
+ /* make sure we have a valid UNC double delimiter prefix */
+ len = strspn(devname, delims);
+ if (len != 2)
+ return -EINVAL;
+
+ /* find delimiter between host and sharename */
+ pos = strpbrk(devname + 2, delims);
+ if (!pos)
+ return -EINVAL;
+
+ /* skip past delimiter */
+ ++pos;
+
+ /* now go until next delimiter or end of string */
+ len = strcspn(pos, delims);
+
+ /* move "pos" up to delimiter or NULL */
+ pos += len;
+ vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
+ if (!vol->UNC)
+ return -ENOMEM;
+
+ convert_delimiter(vol->UNC, '\\');
+
+ /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
+ if (!*pos++ || !*pos)
+ return 0;
+
+ vol->prepath = kstrdup(pos, GFP_KERNEL);
+ if (!vol->prepath)
+ return -ENOMEM;
+
+ return 0;
+}
+
static int
cifs_parse_mount_options(const char *mountdata, const char *devname,
struct smb_vol *vol)
@@ -1108,11 +1160,17 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
char *string = NULL;
char *tmp_end, *value;
char delim;
+ bool got_ip = false;
+ unsigned short port = 0;
+ struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
separator[0] = ',';
separator[1] = 0;
delim = separator[0];
+ /* ensure we always start with zeroed-out smb_vol */
+ memset(vol, 0, sizeof(*vol));
+
/*
* does not have to be perfect mapping since field is
* informational, only used for servers that do not support
@@ -1169,6 +1227,16 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->backupuid_specified = false; /* no backup intent for a user */
vol->backupgid_specified = false; /* no backup intent for a group */
+ /*
+ * For now, we ignore -EINVAL errors under the assumption that the
+ * unc= and prefixpath= options will be usable.
+ */
+ if (cifs_parse_devname(devname, vol) == -ENOMEM) {
+ printk(KERN_ERR "CIFS: Unable to allocate memory to parse "
+ "device string.\n");
+ goto out_nomem;
+ }
+
while ((data = strsep(&options, separator)) != NULL) {
substring_t args[MAX_OPT_ARGS];
unsigned long option;
@@ -1416,12 +1484,12 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->dir_mode = option;
break;
case Opt_port:
- if (get_option_ul(args, &option)) {
- cERROR(1, "%s: Invalid port value",
- __func__);
+ if (get_option_ul(args, &option) ||
+ option > USHRT_MAX) {
+ cERROR(1, "%s: Invalid port value", __func__);
goto cifs_parse_mount_err;
}
- vol->port = option;
+ port = (unsigned short)option;
break;
case Opt_rsize:
if (get_option_ul(args, &option)) {
@@ -1537,53 +1605,45 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->password[j] = '\0';
break;
case Opt_blank_ip:
- vol->UNCip = NULL;
+ /* FIXME: should this be an error instead? */
+ got_ip = false;
break;
case Opt_ip:
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
- if (strnlen(string, INET6_ADDRSTRLEN) >
- INET6_ADDRSTRLEN) {
- printk(KERN_WARNING "CIFS: ip address "
- "too long\n");
- goto cifs_parse_mount_err;
- }
- vol->UNCip = kstrdup(string, GFP_KERNEL);
- if (!vol->UNCip) {
- printk(KERN_WARNING "CIFS: no memory "
- "for UNC IP\n");
+ if (!cifs_convert_address(dstaddr, string,
+ strlen(string))) {
+ printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
+ string);
goto cifs_parse_mount_err;
}
+ got_ip = true;
break;
case Opt_unc:
- string = match_strdup(args);
- if (string == NULL)
+ string = vol->UNC;
+ vol->UNC = match_strdup(args);
+ if (vol->UNC == NULL)
goto out_nomem;
- temp_len = strnlen(string, 300);
- if (temp_len == 300) {
- printk(KERN_WARNING "CIFS: UNC name too long\n");
- goto cifs_parse_mount_err;
- }
-
- vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
- if (vol->UNC == NULL) {
- printk(KERN_WARNING "CIFS: no memory for UNC\n");
- goto cifs_parse_mount_err;
- }
- strcpy(vol->UNC, string);
-
- if (strncmp(string, "//", 2) == 0) {
- vol->UNC[0] = '\\';
- vol->UNC[1] = '\\';
- } else if (strncmp(string, "\\\\", 2) != 0) {
- printk(KERN_WARNING "CIFS: UNC Path does not "
- "begin with // or \\\\\n");
+ convert_delimiter(vol->UNC, '\\');
+ if (vol->UNC[0] != '\\' || vol->UNC[1] != '\\') {
+ printk(KERN_ERR "CIFS: UNC Path does not "
+ "begin with // or \\\\\n");
goto cifs_parse_mount_err;
}
+ /* Compare old unc= option to new one */
+ if (!string || strcmp(string, vol->UNC))
+ printk(KERN_WARNING "CIFS: the value of the "
+ "unc= mount option does not match the "
+ "device string. Using the unc= option "
+ "for now. In 3.10, that option will "
+ "be ignored and the contents of the "
+ "device string will be used "
+ "instead. (%s != %s)\n", string,
+ vol->UNC);
break;
case Opt_domain:
string = match_strdup(args);
@@ -1618,31 +1678,24 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
}
break;
case Opt_prefixpath:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
-
- temp_len = strnlen(string, 1024);
- if (string[0] != '/')
- temp_len++; /* missing leading slash */
- if (temp_len > 1024) {
- printk(KERN_WARNING "CIFS: prefix too long\n");
- goto cifs_parse_mount_err;
- }
-
- vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
- if (vol->prepath == NULL) {
- printk(KERN_WARNING "CIFS: no memory "
- "for path prefix\n");
- goto cifs_parse_mount_err;
- }
-
- if (string[0] != '/') {
- vol->prepath[0] = '/';
- strcpy(vol->prepath+1, string);
- } else
- strcpy(vol->prepath, string);
+ /* skip over any leading delimiter */
+ if (*args[0].from == '/' || *args[0].from == '\\')
+ args[0].from++;
+ string = vol->prepath;
+ vol->prepath = match_strdup(args);
+ if (vol->prepath == NULL)
+ goto out_nomem;
+ /* Compare old prefixpath= option to new one */
+ if (!string || strcmp(string, vol->prepath))
+ printk(KERN_WARNING "CIFS: the value of the "
+ "prefixpath= mount option does not "
+ "match the device string. Using the "
+ "prefixpath= option for now. In 3.10, "
+ "that option will be ignored and the "
+ "contents of the device string will be "
+ "used instead.(%s != %s)\n", string,
+ vol->prepath);
break;
case Opt_iocharset:
string = match_strdup(args);
@@ -1799,9 +1852,30 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
goto cifs_parse_mount_err;
}
#endif
+ if (!vol->UNC) {
+ cERROR(1, "CIFS mount error: No usable UNC path provided in "
+ "device string or in unc= option!");
+ goto cifs_parse_mount_err;
+ }
- if (vol->UNCip == NULL)
- vol->UNCip = &vol->UNC[2];
+ /* make sure UNC has a share name */
+ if (!strchr(vol->UNC + 3, '\\')) {
+ cERROR(1, "Malformed UNC. Unable to find share name.");
+ goto cifs_parse_mount_err;
+ }
+
+ if (!got_ip) {
+ /* No ip= option specified? Try to get it from UNC */
+ if (!cifs_convert_address(dstaddr, &vol->UNC[2],
+ strlen(&vol->UNC[2]))) {
+ printk(KERN_ERR "Unable to determine destination "
+ "address.\n");
+ goto cifs_parse_mount_err;
+ }
+ }
+
+ /* set the port that we got earlier */
+ cifs_set_port(dstaddr, port);
if (uid_specified)
vol->override_uid = override_uid;
@@ -1843,7 +1917,7 @@ srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
}
case AF_INET6: {
struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
- struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs;
+ struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
}
default:
@@ -1972,9 +2046,10 @@ match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
return true;
}
-static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
- struct smb_vol *vol)
+static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
{
+ struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
+
if ((server->vals != vol->vals) || (server->ops != vol->ops))
return 0;
@@ -1995,13 +2070,13 @@ static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
}
static struct TCP_Server_Info *
-cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
+cifs_find_tcp_session(struct smb_vol *vol)
{
struct TCP_Server_Info *server;
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
- if (!match_server(server, addr, vol))
+ if (!match_server(server, vol))
continue;
++server->srv_count;
@@ -2051,40 +2126,12 @@ static struct TCP_Server_Info *
cifs_get_tcp_session(struct smb_vol *volume_info)
{
struct TCP_Server_Info *tcp_ses = NULL;
- struct sockaddr_storage addr;
- struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
- struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
int rc;
- memset(&addr, 0, sizeof(struct sockaddr_storage));
-
- cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
-
- if (volume_info->UNCip && volume_info->UNC) {
- rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
- volume_info->UNCip,
- strlen(volume_info->UNCip),
- volume_info->port);
- if (!rc) {
- /* we failed translating address */
- rc = -EINVAL;
- goto out_err;
- }
- } else if (volume_info->UNCip) {
- /* BB using ip addr as tcp_ses name to connect to the
- DFS root below */
- cERROR(1, "Connecting to DFS root not implemented yet");
- rc = -EINVAL;
- goto out_err;
- } else /* which tcp_sess DFS root would we conect to */ {
- cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
- "unc=//192.168.1.100/public) specified");
- rc = -EINVAL;
- goto out_err;
- }
+ cFYI(1, "UNC: %s", volume_info->UNC);
/* see if we already have a matching tcp_ses */
- tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
+ tcp_ses = cifs_find_tcp_session(volume_info);
if (tcp_ses)
return tcp_ses;
@@ -2129,27 +2176,18 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
-
+ memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
+ sizeof(tcp_ses->srcaddr));
+ memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
+ sizeof(tcp_ses->dstaddr));
/*
* at this point we are the only ones with the pointer
* to the struct since the kernel thread not created yet
* no need to spinlock this init of tcpStatus or srv_count
*/
tcp_ses->tcpStatus = CifsNew;
- memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
- sizeof(tcp_ses->srcaddr));
++tcp_ses->srv_count;
- if (addr.ss_family == AF_INET6) {
- cFYI(1, "attempting ipv6 connect");
- /* BB should we allow ipv6 on port 139? */
- /* other OS never observed in Wild doing 139 with v6 */
- memcpy(&tcp_ses->dstaddr, sin_server6,
- sizeof(struct sockaddr_in6));
- } else
- memcpy(&tcp_ses->dstaddr, sin_server,
- sizeof(struct sockaddr_in));
-
rc = ip_connect(tcp_ses);
if (rc < 0) {
cERROR(1, "Error connecting to socket. Aborting operation");
@@ -2397,8 +2435,6 @@ cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
}
#endif /* CONFIG_KEYS */
-static bool warned_on_ntlm; /* globals init to false automatically */
-
static struct cifs_ses *
cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
{
@@ -2475,14 +2511,6 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
ses->cred_uid = volume_info->cred_uid;
ses->linux_uid = volume_info->linux_uid;
- /* ntlmv2 is much stronger than ntlm security, and has been broadly
- supported for many years, time to update default security mechanism */
- if ((volume_info->secFlg == 0) && warned_on_ntlm == false) {
- warned_on_ntlm = true;
- cERROR(1, "default security mechanism requested. The default "
- "security mechanism will be upgraded from ntlm to "
- "ntlmv2 in kernel release 3.3");
- }
ses->overrideSecFlg = volume_info->secFlg;
mutex_lock(&ses->session_mutex);
@@ -2598,13 +2626,6 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
}
}
- if (strchr(volume_info->UNC + 3, '\\') == NULL
- && strchr(volume_info->UNC + 3, '/') == NULL) {
- cERROR(1, "Missing share name");
- rc = -ENODEV;
- goto out_fail;
- }
-
/*
* BB Do we need to wrap session_mutex around this TCon call and Unix
* SetFS as we do on SessSetup and reconnect?
@@ -2718,11 +2739,8 @@ cifs_match_super(struct super_block *sb, void *data)
struct cifs_ses *ses;
struct cifs_tcon *tcon;
struct tcon_link *tlink;
- struct sockaddr_storage addr;
int rc = 0;
- memset(&addr, 0, sizeof(struct sockaddr_storage));
-
spin_lock(&cifs_tcp_ses_lock);
cifs_sb = CIFS_SB(sb);
tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
@@ -2736,17 +2754,7 @@ cifs_match_super(struct super_block *sb, void *data)
volume_info = mnt_data->vol;
- if (!volume_info->UNCip || !volume_info->UNC)
- goto out;
-
- rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
- volume_info->UNCip,
- strlen(volume_info->UNCip),
- volume_info->port);
- if (!rc)
- goto out;
-
- if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) ||
+ if (!match_server(tcp_srv, volume_info) ||
!match_session(ses, volume_info) ||
!match_tcon(tcon, volume_info->UNC)) {
rc = 0;
@@ -3261,8 +3269,6 @@ cleanup_volume_info_contents(struct smb_vol *volume_info)
{
kfree(volume_info->username);
kzfree(volume_info->password);
- if (volume_info->UNCip != volume_info->UNC + 2)
- kfree(volume_info->UNCip);
kfree(volume_info->UNC);
kfree(volume_info->domainname);
kfree(volume_info->iocharset);
@@ -3280,14 +3286,16 @@ cifs_cleanup_volume_info(struct smb_vol *volume_info)
#ifdef CONFIG_CIFS_DFS_UPCALL
-/* build_path_to_root returns full path to root when
- * we do not have an exiting connection (tcon) */
+/*
+ * cifs_build_path_to_root returns full path to root when we do not have an
+ * exiting connection (tcon)
+ */
static char *
build_unc_path_to_root(const struct smb_vol *vol,
const struct cifs_sb_info *cifs_sb)
{
char *full_path, *pos;
- unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0;
+ unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
@@ -3298,6 +3306,7 @@ build_unc_path_to_root(const struct smb_vol *vol,
pos = full_path + unc_len;
if (pplen) {
+ *pos++ = CIFS_DIR_SEP(cifs_sb);
strncpy(pos, vol->prepath, pplen);
pos += pplen;
}
@@ -3353,7 +3362,6 @@ expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
mdata = NULL;
} else {
cleanup_volume_info_contents(volume_info);
- memset(volume_info, '\0', sizeof(*volume_info));
rc = cifs_setup_volume_info(volume_info, mdata,
fake_devname);
}
@@ -3375,7 +3383,6 @@ cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
if (cifs_parse_mount_options(mount_data, devname, volume_info))
return -EINVAL;
-
if (volume_info->nullauth) {
cFYI(1, "Anonymous login");
kfree(volume_info->username);
@@ -3412,7 +3419,7 @@ cifs_get_volume_info(char *mount_data, const char *devname)
int rc;
struct smb_vol *volume_info;
- volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
+ volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
if (!volume_info)
return ERR_PTR(-ENOMEM);
@@ -3537,8 +3544,10 @@ remote_path_check:
rc = -ENOSYS;
goto mount_fail_check;
}
- /* build_path_to_root works only when we have a valid tcon */
- full_path = build_path_to_root(volume_info, cifs_sb, tcon);
+ /*
+ * cifs_build_path_to_root works only when we have a valid tcon
+ */
+ full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
if (full_path == NULL) {
rc = -ENOMEM;
goto mount_fail_check;
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 7c0a8128364..8719bbe0dcc 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -44,6 +44,38 @@ renew_parental_timestamps(struct dentry *direntry)
} while (!IS_ROOT(direntry));
}
+char *
+cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
+ struct cifs_tcon *tcon)
+{
+ int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
+ int dfsplen;
+ char *full_path = NULL;
+
+ /* if no prefix path, simply set path to the root of share to "" */
+ if (pplen == 0) {
+ full_path = kzalloc(1, GFP_KERNEL);
+ return full_path;
+ }
+
+ if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
+ dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
+ else
+ dfsplen = 0;
+
+ full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
+ if (full_path == NULL)
+ return full_path;
+
+ if (dfsplen)
+ strncpy(full_path, tcon->treeName, dfsplen);
+ full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb);
+ strncpy(full_path + dfsplen + 1, vol->prepath, pplen);
+ convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
+ full_path[dfsplen + pplen] = 0; /* add trailing null */
+ return full_path;
+}
+
/* Note: caller must free return buffer */
char *
build_path_from_dentry(struct dentry *direntry)
@@ -398,7 +430,16 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
* in network traffic in the other paths.
*/
if (!(oflags & O_CREAT)) {
- struct dentry *res = cifs_lookup(inode, direntry, 0);
+ struct dentry *res;
+
+ /*
+ * Check for hashed negative dentry. We have already revalidated
+ * the dentry and it is fine. No need to perform another lookup.
+ */
+ if (!d_unhashed(direntry))
+ return -ENOENT;
+
+ res = cifs_lookup(inode, direntry, 0);
if (IS_ERR(res))
return PTR_ERR(res);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index edb25b4bbb9..8ea6ca50a66 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -238,6 +238,23 @@ out:
return rc;
}
+static bool
+cifs_has_mand_locks(struct cifsInodeInfo *cinode)
+{
+ struct cifs_fid_locks *cur;
+ bool has_locks = false;
+
+ down_read(&cinode->lock_sem);
+ list_for_each_entry(cur, &cinode->llist, llist) {
+ if (!list_empty(&cur->locks)) {
+ has_locks = true;
+ break;
+ }
+ }
+ up_read(&cinode->lock_sem);
+ return has_locks;
+}
+
struct cifsFileInfo *
cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
struct tcon_link *tlink, __u32 oplock)
@@ -248,6 +265,7 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
struct cifsFileInfo *cfile;
struct cifs_fid_locks *fdlocks;
struct cifs_tcon *tcon = tlink_tcon(tlink);
+ struct TCP_Server_Info *server = tcon->ses->server;
cfile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
if (cfile == NULL)
@@ -276,12 +294,22 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
INIT_WORK(&cfile->oplock_break, cifs_oplock_break);
mutex_init(&cfile->fh_mutex);
+ /*
+ * If the server returned a read oplock and we have mandatory brlocks,
+ * set oplock level to None.
+ */
+ if (oplock == server->vals->oplock_read &&
+ cifs_has_mand_locks(cinode)) {
+ cFYI(1, "Reset oplock val from read to None due to mand locks");
+ oplock = 0;
+ }
+
spin_lock(&cifs_file_list_lock);
- if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE)
+ if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE && oplock)
oplock = fid->pending_open->oplock;
list_del(&fid->pending_open->olist);
- tlink_tcon(tlink)->ses->server->ops->set_fid(cfile, fid, oplock);
+ server->ops->set_fid(cfile, fid, oplock);
list_add(&cfile->tlist, &tcon->openFileList);
/* if readable file instance put first in list*/
@@ -505,16 +533,36 @@ out:
return rc;
}
+static int cifs_push_posix_locks(struct cifsFileInfo *cfile);
+
/*
* Try to reacquire byte range locks that were released when session
- * to server was lost
+ * to server was lost.
*/
-static int cifs_relock_file(struct cifsFileInfo *cifsFile)
+static int
+cifs_relock_file(struct cifsFileInfo *cfile)
{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb);
+ struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
+ struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
int rc = 0;
- /* BB list all locks open on this file and relock */
+ /* we are going to update can_cache_brlcks here - need a write access */
+ down_write(&cinode->lock_sem);
+ if (cinode->can_cache_brlcks) {
+ /* can cache locks - no need to push them */
+ up_write(&cinode->lock_sem);
+ return rc;
+ }
+
+ if (cap_unix(tcon->ses) &&
+ (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
+ ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+ rc = cifs_push_posix_locks(cfile);
+ else
+ rc = tcon->ses->server->ops->push_mand_locks(cfile);
+ up_write(&cinode->lock_sem);
return rc;
}
@@ -739,10 +787,15 @@ cifs_del_lock_waiters(struct cifsLockInfo *lock)
}
}
+#define CIFS_LOCK_OP 0
+#define CIFS_READ_OP 1
+#define CIFS_WRITE_OP 2
+
+/* @rw_check : 0 - no op, 1 - read, 2 - write */
static bool
cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
__u64 length, __u8 type, struct cifsFileInfo *cfile,
- struct cifsLockInfo **conf_lock, bool rw_check)
+ struct cifsLockInfo **conf_lock, int rw_check)
{
struct cifsLockInfo *li;
struct cifsFileInfo *cur_cfile = fdlocks->cfile;
@@ -752,9 +805,13 @@ cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
if (offset + length <= li->offset ||
offset >= li->offset + li->length)
continue;
- if (rw_check && server->ops->compare_fids(cfile, cur_cfile) &&
- current->tgid == li->pid)
- continue;
+ if (rw_check != CIFS_LOCK_OP && current->tgid == li->pid &&
+ server->ops->compare_fids(cfile, cur_cfile)) {
+ /* shared lock prevents write op through the same fid */
+ if (!(li->type & server->vals->shared_lock_type) ||
+ rw_check != CIFS_WRITE_OP)
+ continue;
+ }
if ((type & server->vals->shared_lock_type) &&
((server->ops->compare_fids(cfile, cur_cfile) &&
current->tgid == li->pid) || type == li->type))
@@ -769,7 +826,7 @@ cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
bool
cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
__u8 type, struct cifsLockInfo **conf_lock,
- bool rw_check)
+ int rw_check)
{
bool rc = false;
struct cifs_fid_locks *cur;
@@ -805,7 +862,7 @@ cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
down_read(&cinode->lock_sem);
exist = cifs_find_lock_conflict(cfile, offset, length, type,
- &conf_lock, false);
+ &conf_lock, CIFS_LOCK_OP);
if (exist) {
flock->fl_start = conf_lock->offset;
flock->fl_end = conf_lock->offset + conf_lock->length - 1;
@@ -852,7 +909,7 @@ try_again:
down_write(&cinode->lock_sem);
exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length,
- lock->type, &conf_lock, false);
+ lock->type, &conf_lock, CIFS_LOCK_OP);
if (!exist && cinode->can_cache_brlcks) {
list_add_tail(&lock->llist, &cfile->llist->locks);
up_write(&cinode->lock_sem);
@@ -948,7 +1005,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
int rc = 0, stored_rc;
struct cifsLockInfo *li, *tmp;
struct cifs_tcon *tcon;
- struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
unsigned int num, max_num, max_buf;
LOCKING_ANDX_RANGE *buf, *cur;
int types[] = {LOCKING_ANDX_LARGE_FILES,
@@ -958,21 +1014,12 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
xid = get_xid();
tcon = tlink_tcon(cfile->tlink);
- /* we are going to update can_cache_brlcks here - need a write access */
- down_write(&cinode->lock_sem);
- if (!cinode->can_cache_brlcks) {
- up_write(&cinode->lock_sem);
- free_xid(xid);
- return rc;
- }
-
/*
* Accessing maxBuf is racy with cifs_reconnect - need to store value
* and check it for zero before using.
*/
max_buf = tcon->ses->server->maxBuf;
if (!max_buf) {
- up_write(&cinode->lock_sem);
free_xid(xid);
return -EINVAL;
}
@@ -981,7 +1028,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
sizeof(LOCKING_ANDX_RANGE);
buf = kzalloc(max_num * sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL);
if (!buf) {
- up_write(&cinode->lock_sem);
free_xid(xid);
return -ENOMEM;
}
@@ -1018,9 +1064,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
}
}
- cinode->can_cache_brlcks = false;
- up_write(&cinode->lock_sem);
-
kfree(buf);
free_xid(xid);
return rc;
@@ -1043,7 +1086,6 @@ struct lock_to_push {
static int
cifs_push_posix_locks(struct cifsFileInfo *cfile)
{
- struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
struct file_lock *flock, **before;
unsigned int count = 0, i = 0;
@@ -1054,14 +1096,6 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
xid = get_xid();
- /* we are going to update can_cache_brlcks here - need a write access */
- down_write(&cinode->lock_sem);
- if (!cinode->can_cache_brlcks) {
- up_write(&cinode->lock_sem);
- free_xid(xid);
- return rc;
- }
-
lock_flocks();
cifs_for_each_lock(cfile->dentry->d_inode, before) {
if ((*before)->fl_flags & FL_POSIX)
@@ -1127,9 +1161,6 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
}
out:
- cinode->can_cache_brlcks = false;
- up_write(&cinode->lock_sem);
-
free_xid(xid);
return rc;
err_out:
@@ -1144,14 +1175,27 @@ static int
cifs_push_locks(struct cifsFileInfo *cfile)
{
struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb);
+ struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+ int rc = 0;
+
+ /* we are going to update can_cache_brlcks here - need a write access */
+ down_write(&cinode->lock_sem);
+ if (!cinode->can_cache_brlcks) {
+ up_write(&cinode->lock_sem);
+ return rc;
+ }
if (cap_unix(tcon->ses) &&
(CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
- return cifs_push_posix_locks(cfile);
+ rc = cifs_push_posix_locks(cfile);
+ else
+ rc = tcon->ses->server->ops->push_mand_locks(cfile);
- return tcon->ses->server->ops->push_mand_locks(cfile);
+ cinode->can_cache_brlcks = false;
+ up_write(&cinode->lock_sem);
+ return rc;
}
static void
@@ -1406,6 +1450,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data;
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
struct TCP_Server_Info *server = tcon->ses->server;
+ struct inode *inode = cfile->dentry->d_inode;
if (posix_lck) {
int posix_lock_type;
@@ -1436,16 +1481,33 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
return -ENOMEM;
rc = cifs_lock_add_if(cfile, lock, wait_flag);
- if (rc < 0)
+ if (rc < 0) {
kfree(lock);
- if (rc <= 0)
+ return rc;
+ }
+ if (!rc)
goto out;
+ /*
+ * Windows 7 server can delay breaking lease from read to None
+ * if we set a byte-range lock on a file - break it explicitly
+ * before sending the lock to the server to be sure the next
+ * read won't conflict with non-overlapted locks due to
+ * pagereading.
+ */
+ if (!CIFS_I(inode)->clientCanCacheAll &&
+ CIFS_I(inode)->clientCanCacheRead) {
+ cifs_invalidate_mapping(inode);
+ cFYI(1, "Set no oplock for inode=%p due to mand locks",
+ inode);
+ CIFS_I(inode)->clientCanCacheRead = false;
+ }
+
rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length,
type, 1, 0, wait_flag);
if (rc) {
kfree(lock);
- goto out;
+ return rc;
}
cifs_lock_add(cfile, lock);
@@ -1794,7 +1856,6 @@ static int cifs_writepages(struct address_space *mapping,
struct TCP_Server_Info *server;
struct page *page;
int rc = 0;
- loff_t isize = i_size_read(mapping->host);
/*
* If wsize is smaller than the page cache size, default to writing
@@ -1899,7 +1960,7 @@ retry:
*/
set_page_writeback(page);
- if (page_offset(page) >= isize) {
+ if (page_offset(page) >= i_size_read(mapping->host)) {
done = true;
unlock_page(page);
end_page_writeback(page);
@@ -1932,7 +1993,8 @@ retry:
wdata->offset = page_offset(wdata->pages[0]);
wdata->pagesz = PAGE_CACHE_SIZE;
wdata->tailsz =
- min(isize - page_offset(wdata->pages[nr_pages - 1]),
+ min(i_size_read(mapping->host) -
+ page_offset(wdata->pages[nr_pages - 1]),
(loff_t)PAGE_CACHE_SIZE);
wdata->bytes = ((nr_pages - 1) * PAGE_CACHE_SIZE) +
wdata->tailsz;
@@ -2457,7 +2519,7 @@ cifs_writev(struct kiocb *iocb, const struct iovec *iov,
down_read(&cinode->lock_sem);
if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs),
server->vals->exclusive_lock_type, NULL,
- true)) {
+ CIFS_WRITE_OP)) {
mutex_lock(&inode->i_mutex);
rc = __generic_file_aio_write(iocb, iov, nr_segs,
&iocb->ki_pos);
@@ -2487,42 +2549,34 @@ cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov,
struct cifsFileInfo *cfile = (struct cifsFileInfo *)
iocb->ki_filp->private_data;
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+ ssize_t written;
-#ifdef CONFIG_CIFS_SMB2
- /*
- * If we have an oplock for read and want to write a data to the file
- * we need to store it in the page cache and then push it to the server
- * to be sure the next read will get a valid data.
- */
- if (!cinode->clientCanCacheAll && cinode->clientCanCacheRead) {
- ssize_t written;
- int rc;
-
- written = generic_file_aio_write(iocb, iov, nr_segs, pos);
- rc = filemap_fdatawrite(inode->i_mapping);
- if (rc)
- return (ssize_t)rc;
-
- return written;
+ if (cinode->clientCanCacheAll) {
+ if (cap_unix(tcon->ses) &&
+ (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability))
+ && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+ return generic_file_aio_write(iocb, iov, nr_segs, pos);
+ return cifs_writev(iocb, iov, nr_segs, pos);
}
-#endif
-
/*
* For non-oplocked files in strict cache mode we need to write the data
* to the server exactly from the pos to pos+len-1 rather than flush all
* affected pages because it may cause a error with mandatory locks on
* these pages but not on the region from pos to ppos+len-1.
*/
-
- if (!cinode->clientCanCacheAll)
- return cifs_user_writev(iocb, iov, nr_segs, pos);
-
- if (cap_unix(tcon->ses) &&
- (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
- ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
- return generic_file_aio_write(iocb, iov, nr_segs, pos);
-
- return cifs_writev(iocb, iov, nr_segs, pos);
+ written = cifs_user_writev(iocb, iov, nr_segs, pos);
+ if (written > 0 && cinode->clientCanCacheRead) {
+ /*
+ * Windows 7 server can delay breaking level2 oplock if a write
+ * request comes - break it on the client to prevent reading
+ * an old data.
+ */
+ cifs_invalidate_mapping(inode);
+ cFYI(1, "Set no oplock for inode=%p after a write operation",
+ inode);
+ cinode->clientCanCacheRead = false;
+ }
+ return written;
}
static struct cifs_readdata *
@@ -2892,7 +2946,7 @@ cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov,
down_read(&cinode->lock_sem);
if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs),
tcon->ses->server->vals->shared_lock_type,
- NULL, true))
+ NULL, CIFS_READ_OP))
rc = generic_file_aio_read(iocb, iov, nr_segs, pos);
up_read(&cinode->lock_sem);
return rc;
@@ -3527,6 +3581,13 @@ void cifs_oplock_break(struct work_struct *work)
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
int rc = 0;
+ if (!cinode->clientCanCacheAll && cinode->clientCanCacheRead &&
+ cifs_has_mand_locks(cinode)) {
+ cFYI(1, "Reset oplock to None for inode=%p due to mand locks",
+ inode);
+ cinode->clientCanCacheRead = false;
+ }
+
if (inode && S_ISREG(inode->i_mode)) {
if (cinode->clientCanCacheRead)
break_lease(inode, O_RDONLY);
@@ -3536,7 +3597,7 @@ void cifs_oplock_break(struct work_struct *work)
if (cinode->clientCanCacheRead == 0) {
rc = filemap_fdatawait(inode->i_mapping);
mapping_set_error(inode->i_mapping, rc);
- invalidate_remote_inode(inode);
+ cifs_invalidate_mapping(inode);
}
cFYI(1, "Oplock flush inode %p rc %d", inode, rc);
}
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index afdff79651f..ed6208ff85a 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1791,11 +1791,12 @@ int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
stat->ino = CIFS_I(inode)->uniqueid;
/*
- * If on a multiuser mount without unix extensions, and the admin hasn't
- * overridden them, set the ownership to the fsuid/fsgid of the current
- * process.
+ * If on a multiuser mount without unix extensions or cifsacl being
+ * enabled, and the admin hasn't overridden them, set the ownership
+ * to the fsuid/fsgid of the current process.
*/
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
+ !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
!tcon->unix_ext) {
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
stat->uid = current_fsuid();
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index d5ce9e26696..a82bc51fdc8 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -204,7 +204,7 @@ cifs_convert_address(struct sockaddr *dst, const char *src, int len)
return rc;
}
-int
+void
cifs_set_port(struct sockaddr *addr, const unsigned short int port)
{
switch (addr->sa_family) {
@@ -214,19 +214,7 @@ cifs_set_port(struct sockaddr *addr, const unsigned short int port)
case AF_INET6:
((struct sockaddr_in6 *)addr)->sin6_port = htons(port);
break;
- default:
- return 0;
}
- return 1;
-}
-
-int
-cifs_fill_sockaddr(struct sockaddr *dst, const char *src, int len,
- const unsigned short int port)
-{
- if (!cifs_convert_address(dst, src, len))
- return 0;
- return cifs_set_port(dst, port);
}
/*****************************************************************************
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index f9b5d3d6cf3..cdd6ff48246 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -66,18 +66,21 @@ static inline void dump_cifs_file_struct(struct file *file, char *label)
#endif /* DEBUG2 */
/*
+ * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT
+ *
* Find the dentry that matches "name". If there isn't one, create one. If it's
* a negative dentry or the uniqueid changed, then drop it and recreate it.
*/
-static struct dentry *
-cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
+static void
+cifs_prime_dcache(struct dentry *parent, struct qstr *name,
struct cifs_fattr *fattr)
{
struct dentry *dentry, *alias;
struct inode *inode;
struct super_block *sb = parent->d_inode->i_sb;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
- cFYI(1, "For %s", name->name);
+ cFYI(1, "%s: for %s", __func__, name->name);
if (parent->d_op && parent->d_op->d_hash)
parent->d_op->d_hash(parent, parent->d_inode, name);
@@ -86,35 +89,43 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
dentry = d_lookup(parent, name);
if (dentry) {
+ int err;
+
inode = dentry->d_inode;
- /* update inode in place if i_ino didn't change */
- if (inode && CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
- cifs_fattr_to_inode(inode, fattr);
- return dentry;
+ if (inode) {
+ /*
+ * If we're generating inode numbers, then we don't
+ * want to clobber the existing one with the one that
+ * the readdir code created.
+ */
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
+ fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
+
+ /* update inode in place if i_ino didn't change */
+ if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
+ cifs_fattr_to_inode(inode, fattr);
+ goto out;
+ }
}
- d_drop(dentry);
+ err = d_invalidate(dentry);
dput(dentry);
+ if (err)
+ return;
}
dentry = d_alloc(parent, name);
- if (dentry == NULL)
- return NULL;
+ if (!dentry)
+ return;
inode = cifs_iget(sb, fattr);
- if (!inode) {
- dput(dentry);
- return NULL;
- }
+ if (!inode)
+ goto out;
alias = d_materialise_unique(dentry, inode);
- if (alias != NULL) {
- dput(dentry);
- if (IS_ERR(alias))
- return NULL;
- dentry = alias;
- }
-
- return dentry;
+ if (alias && !IS_ERR(alias))
+ dput(alias);
+out:
+ dput(dentry);
}
static void
@@ -134,6 +145,16 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
if (fattr->cf_cifsattrs & ATTR_READONLY)
fattr->cf_mode &= ~S_IWUGO;
+ /*
+ * We of course don't get ACL info in FIND_FIRST/NEXT results, so
+ * mark it for revalidation so that "ls -l" will look right. It might
+ * be super-slow, but if we don't do this then the ownership of files
+ * may look wrong since the inodes may not have timed out by the time
+ * "ls" does a stat() call on them.
+ */
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
+ fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
+
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
fattr->cf_cifsattrs & ATTR_SYSTEM) {
if (fattr->cf_eof == 0) {
@@ -649,7 +670,6 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
struct cifs_dirent de = { NULL, };
struct cifs_fattr fattr;
- struct dentry *dentry;
struct qstr name;
int rc = 0;
ino_t ino;
@@ -720,13 +740,11 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,
*/
fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
- ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
- dentry = cifs_readdir_lookup(file->f_dentry, &name, &fattr);
+ cifs_prime_dcache(file->f_dentry, &name, &fattr);
+ ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
rc = filldir(dirent, name.name, name.len, file->f_pos, ino,
fattr.cf_dtype);
-
- dput(dentry);
return rc;
}
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index 56cc4be8780..47bc5a87f94 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -53,6 +53,13 @@ send_nt_cancel(struct TCP_Server_Info *server, void *buf,
mutex_unlock(&server->srv_mutex);
return rc;
}
+
+ /*
+ * The response to this call was already factored into the sequence
+ * number when the call went out, so we must adjust it back downward
+ * after signing here.
+ */
+ --server->sequence_number;
rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
mutex_unlock(&server->srv_mutex);
@@ -575,37 +582,6 @@ cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
}
-static char *
-cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
- struct cifs_tcon *tcon)
-{
- int pplen = vol->prepath ? strlen(vol->prepath) : 0;
- int dfsplen;
- char *full_path = NULL;
-
- /* if no prefix path, simply set path to the root of share to "" */
- if (pplen == 0) {
- full_path = kzalloc(1, GFP_KERNEL);
- return full_path;
- }
-
- if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
- dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
- else
- dfsplen = 0;
-
- full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
- if (full_path == NULL)
- return full_path;
-
- if (dfsplen)
- strncpy(full_path, tcon->treeName, dfsplen);
- strncpy(full_path + dfsplen, vol->prepath, pplen);
- convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
- full_path[dfsplen + pplen] = 0; /* add trailing null */
- return full_path;
-}
-
static void
cifs_clear_stats(struct cifs_tcon *tcon)
{
@@ -766,7 +742,6 @@ smb_set_file_info(struct inode *inode, const char *full_path,
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink = NULL;
struct cifs_tcon *tcon;
- FILE_BASIC_INFO info_buf;
/* if the file is already open for write, just use that fileid */
open_file = find_writable_file(cinode, true);
@@ -817,7 +792,7 @@ smb_set_file_info(struct inode *inode, const char *full_path,
netpid = current->tgid;
set_via_filehandle:
- rc = CIFSSMBSetFileInfo(xid, tcon, &info_buf, netfid, netpid);
+ rc = CIFSSMBSetFileInfo(xid, tcon, buf, netfid, netpid);
if (!rc)
cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
@@ -944,7 +919,6 @@ struct smb_version_operations smb1_operations = {
.set_path_size = CIFSSMBSetEOF,
.set_file_size = CIFSSMBSetFileSize,
.set_file_info = smb_set_file_info,
- .build_path_to_root = cifs_build_path_to_root,
.echo = CIFSSMBEcho,
.mkdir = CIFSSMBMkDir,
.mkdir_setinfo = cifs_mkdir_setinfo,
@@ -985,4 +959,5 @@ struct smb_version_values smb1_values = {
.cap_unix = CAP_UNIX,
.cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
.cap_large_files = CAP_LARGE_FILES,
+ .oplock_read = OPLOCK_READ,
};
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
index a93eec30a50..71e6aed4b38 100644
--- a/fs/cifs/smb2file.c
+++ b/fs/cifs/smb2file.c
@@ -260,13 +260,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
struct cifs_fid_locks *fdlocks;
xid = get_xid();
- /* we are going to update can_cache_brlcks here - need a write access */
- down_write(&cinode->lock_sem);
- if (!cinode->can_cache_brlcks) {
- up_write(&cinode->lock_sem);
- free_xid(xid);
- return rc;
- }
/*
* Accessing maxBuf is racy with cifs_reconnect - need to store value
@@ -274,7 +267,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
*/
max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
if (!max_buf) {
- up_write(&cinode->lock_sem);
free_xid(xid);
return -EINVAL;
}
@@ -282,7 +274,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
max_num = max_buf / sizeof(struct smb2_lock_element);
buf = kzalloc(max_num * sizeof(struct smb2_lock_element), GFP_KERNEL);
if (!buf) {
- up_write(&cinode->lock_sem);
free_xid(xid);
return -ENOMEM;
}
@@ -293,10 +284,7 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
rc = stored_rc;
}
- cinode->can_cache_brlcks = false;
kfree(buf);
-
- up_write(&cinode->lock_sem);
free_xid(xid);
return rc;
}
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 4d9dbe0b738..c9c7aa7ed96 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -262,23 +262,6 @@ smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
return rc;
}
-static char *
-smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
- struct cifs_tcon *tcon)
-{
- int pplen = vol->prepath ? strlen(vol->prepath) : 0;
- char *full_path = NULL;
-
- /* if no prefix path, simply set path to the root of share to "" */
- if (pplen == 0) {
- full_path = kzalloc(2, GFP_KERNEL);
- return full_path;
- }
-
- cERROR(1, "prefixpath is not supported for SMB2 now");
- return NULL;
-}
-
static bool
smb2_can_echo(struct TCP_Server_Info *server)
{
@@ -613,7 +596,6 @@ struct smb_version_operations smb21_operations = {
.set_path_size = smb2_set_path_size,
.set_file_size = smb2_set_file_size,
.set_file_info = smb2_set_file_info,
- .build_path_to_root = smb2_build_path_to_root,
.mkdir = smb2_mkdir,
.mkdir_setinfo = smb2_mkdir_setinfo,
.rmdir = smb2_rmdir,
@@ -641,6 +623,92 @@ struct smb_version_operations smb21_operations = {
.get_lease_key = smb2_get_lease_key,
.set_lease_key = smb2_set_lease_key,
.new_lease_key = smb2_new_lease_key,
+ .calc_signature = smb2_calc_signature,
+};
+
+
+struct smb_version_operations smb30_operations = {
+ .compare_fids = smb2_compare_fids,
+ .setup_request = smb2_setup_request,
+ .setup_async_request = smb2_setup_async_request,
+ .check_receive = smb2_check_receive,
+ .add_credits = smb2_add_credits,
+ .set_credits = smb2_set_credits,
+ .get_credits_field = smb2_get_credits_field,
+ .get_credits = smb2_get_credits,
+ .get_next_mid = smb2_get_next_mid,
+ .read_data_offset = smb2_read_data_offset,
+ .read_data_length = smb2_read_data_length,
+ .map_error = map_smb2_to_linux_error,
+ .find_mid = smb2_find_mid,
+ .check_message = smb2_check_message,
+ .dump_detail = smb2_dump_detail,
+ .clear_stats = smb2_clear_stats,
+ .print_stats = smb2_print_stats,
+ .is_oplock_break = smb2_is_valid_oplock_break,
+ .need_neg = smb2_need_neg,
+ .negotiate = smb2_negotiate,
+ .negotiate_wsize = smb2_negotiate_wsize,
+ .negotiate_rsize = smb2_negotiate_rsize,
+ .sess_setup = SMB2_sess_setup,
+ .logoff = SMB2_logoff,
+ .tree_connect = SMB2_tcon,
+ .tree_disconnect = SMB2_tdis,
+ .is_path_accessible = smb2_is_path_accessible,
+ .can_echo = smb2_can_echo,
+ .echo = SMB2_echo,
+ .query_path_info = smb2_query_path_info,
+ .get_srv_inum = smb2_get_srv_inum,
+ .query_file_info = smb2_query_file_info,
+ .set_path_size = smb2_set_path_size,
+ .set_file_size = smb2_set_file_size,
+ .set_file_info = smb2_set_file_info,
+ .mkdir = smb2_mkdir,
+ .mkdir_setinfo = smb2_mkdir_setinfo,
+ .rmdir = smb2_rmdir,
+ .unlink = smb2_unlink,
+ .rename = smb2_rename_path,
+ .create_hardlink = smb2_create_hardlink,
+ .open = smb2_open_file,
+ .set_fid = smb2_set_fid,
+ .close = smb2_close_file,
+ .flush = smb2_flush_file,
+ .async_readv = smb2_async_readv,
+ .async_writev = smb2_async_writev,
+ .sync_read = smb2_sync_read,
+ .sync_write = smb2_sync_write,
+ .query_dir_first = smb2_query_dir_first,
+ .query_dir_next = smb2_query_dir_next,
+ .close_dir = smb2_close_dir,
+ .calc_smb_size = smb2_calc_size,
+ .is_status_pending = smb2_is_status_pending,
+ .oplock_response = smb2_oplock_response,
+ .queryfs = smb2_queryfs,
+ .mand_lock = smb2_mand_lock,
+ .mand_unlock_range = smb2_unlock_range,
+ .push_mand_locks = smb2_push_mandatory_locks,
+ .get_lease_key = smb2_get_lease_key,
+ .set_lease_key = smb2_set_lease_key,
+ .new_lease_key = smb2_new_lease_key,
+ .calc_signature = smb3_calc_signature,
+};
+
+struct smb_version_values smb20_values = {
+ .version_string = SMB20_VERSION_STRING,
+ .protocol_id = SMB20_PROT_ID,
+ .req_capabilities = 0, /* MBZ */
+ .large_lock_type = 0,
+ .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
+ .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
+ .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+ .header_size = sizeof(struct smb2_hdr),
+ .max_header_size = MAX_SMB2_HDR_SIZE,
+ .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
+ .lock_cmd = SMB2_LOCK,
+ .cap_unix = 0,
+ .cap_nt_find = SMB2_NT_FIND,
+ .cap_large_files = SMB2_LARGE_FILES,
+ .oplock_read = SMB2_OPLOCK_LEVEL_II,
};
struct smb_version_values smb21_values = {
@@ -658,6 +726,7 @@ struct smb_version_values smb21_values = {
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
+ .oplock_read = SMB2_OPLOCK_LEVEL_II,
};
struct smb_version_values smb30_values = {
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index cf33622cdac..41d9d0725f0 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -425,7 +425,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
}
cFYI(1, "sec_flags 0x%x", sec_flags);
- if (sec_flags & CIFSSEC_MUST_SIGN) {
+ if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
cFYI(1, "Signing required");
if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED |
SMB2_NEGOTIATE_SIGNING_ENABLED))) {
@@ -612,7 +612,8 @@ ssetup_ntlmssp_authenticate:
/* BB add code to build os and lm fields */
- rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, CIFS_LOG_ERROR);
+ rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
+ CIFS_LOG_ERROR | CIFS_NEG_OP);
kfree(security_blob);
rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 7d25f8b14f9..2aa3535e38c 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -47,6 +47,10 @@ extern struct mid_q_entry *smb2_setup_request(struct cifs_ses *ses,
struct smb_rqst *rqst);
extern struct mid_q_entry *smb2_setup_async_request(
struct TCP_Server_Info *server, struct smb_rqst *rqst);
+extern int smb2_calc_signature(struct smb_rqst *rqst,
+ struct TCP_Server_Info *server);
+extern int smb3_calc_signature(struct smb_rqst *rqst,
+ struct TCP_Server_Info *server);
extern void smb2_echo_request(struct work_struct *work);
extern __le32 smb2_get_lease_state(struct cifsInodeInfo *cinode);
extern __u8 smb2_map_lease_to_oplock(__le32 lease_state);
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 2a5fdf26f79..8dd73e61d76 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -39,7 +39,7 @@
#include "smb2status.h"
#include "smb2glob.h"
-static int
+int
smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
{
int i, rc;
@@ -116,6 +116,13 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
return rc;
}
+int
+smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
+{
+ cFYI(1, "smb3 signatures not supported yet");
+ return -EOPNOTSUPP;
+}
+
/* must be called with server->srv_mutex held */
static int
smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server)
@@ -132,7 +139,7 @@ smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server)
return rc;
}
- rc = smb2_calc_signature(rqst, server);
+ rc = server->ops->calc_signature(rqst, server);
return rc;
}
@@ -168,7 +175,7 @@ smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
memset(smb2_pdu->Signature, 0, SMB2_SIGNATURE_SIZE);
mutex_lock(&server->srv_mutex);
- rc = smb2_calc_signature(rqst, server);
+ rc = server->ops->calc_signature(rqst, server);
mutex_unlock(&server->srv_mutex);
if (rc)
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 76d974c952f..1a528680ec5 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -144,9 +144,6 @@ smb_send_kvec(struct TCP_Server_Info *server, struct kvec *iov, size_t n_vec,
*sent = 0;
- if (ssocket == NULL)
- return -ENOTSOCK; /* BB eventually add reconnect code here */
-
smb_msg.msg_name = (struct sockaddr *) &server->dstaddr;
smb_msg.msg_namelen = sizeof(struct sockaddr);
smb_msg.msg_control = NULL;
@@ -291,6 +288,9 @@ smb_send_rqst(struct TCP_Server_Info *server, struct smb_rqst *rqst)
struct socket *ssocket = server->ssocket;
int val = 1;
+ if (ssocket == NULL)
+ return -ENOTSOCK;
+
cFYI(1, "Sending smb: smb_len=%u", smb_buf_length);
dump_smb(iov[0].iov_base, iov[0].iov_len);