diff options
Diffstat (limited to 'fs/cifs/cifssmb.c')
| -rw-r--r-- | fs/cifs/cifssmb.c | 162 |
1 files changed, 144 insertions, 18 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 5657b79dbc99..bb54ccf8481c 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -44,6 +44,9 @@ #include "cifs_debug.h" #include "fscache.h" #include "smbdirect.h" +#ifdef CONFIG_CIFS_DFS_UPCALL +#include "dfs_cache.h" +#endif #ifdef CONFIG_CIFS_POSIX static struct { @@ -118,6 +121,86 @@ cifs_mark_open_files_invalid(struct cifs_tcon *tcon) */ } +#ifdef CONFIG_CIFS_DFS_UPCALL +static int __cifs_reconnect_tcon(const struct nls_table *nlsc, + struct cifs_tcon *tcon) +{ + int rc; + struct dfs_cache_tgt_list tl; + struct dfs_cache_tgt_iterator *it = NULL; + char *tree; + const char *tcp_host; + size_t tcp_host_len; + const char *dfs_host; + size_t dfs_host_len; + + tree = kzalloc(MAX_TREE_SIZE, GFP_KERNEL); + if (!tree) + return -ENOMEM; + + if (tcon->ipc) { + snprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$", + tcon->ses->server->hostname); + rc = CIFSTCon(0, tcon->ses, tree, tcon, nlsc); + goto out; + } + + if (!tcon->dfs_path) { + rc = CIFSTCon(0, tcon->ses, tcon->treeName, tcon, nlsc); + goto out; + } + + rc = dfs_cache_noreq_find(tcon->dfs_path + 1, NULL, &tl); + if (rc) + goto out; + + extract_unc_hostname(tcon->ses->server->hostname, &tcp_host, + &tcp_host_len); + + for (it = dfs_cache_get_tgt_iterator(&tl); it; + it = dfs_cache_get_next_tgt(&tl, it)) { + const char *tgt = dfs_cache_get_tgt_name(it); + + extract_unc_hostname(tgt, &dfs_host, &dfs_host_len); + + if (dfs_host_len != tcp_host_len + || strncasecmp(dfs_host, tcp_host, dfs_host_len) != 0) { + cifs_dbg(FYI, "%s: skipping %.*s, doesn't match %.*s", + __func__, + (int)dfs_host_len, dfs_host, + (int)tcp_host_len, tcp_host); + continue; + } + + snprintf(tree, MAX_TREE_SIZE, "\\%s", tgt); + + rc = CIFSTCon(0, tcon->ses, tree, tcon, nlsc); + if (!rc) + break; + if (rc == -EREMOTE) + break; + } + + if (!rc) { + if (it) + rc = dfs_cache_noreq_update_tgthint(tcon->dfs_path + 1, + it); + else + rc = -ENOENT; + } + dfs_cache_free_tgts(&tl); +out: + kfree(tree); + return rc; +} +#else +static inline int __cifs_reconnect_tcon(const struct nls_table *nlsc, + struct cifs_tcon *tcon) +{ + return CIFSTCon(0, tcon->ses, tcon->treeName, tcon, nlsc); +} +#endif + /* reconnect the socket, tcon, and smb session if needed */ static int cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) @@ -126,6 +209,7 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) struct cifs_ses *ses; struct TCP_Server_Info *server; struct nls_table *nls_codepage; + int retries; /* * SMBs NegProt, SessSetup, uLogoff do not have tcon yet so check for @@ -152,9 +236,12 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) } } + retries = server->nr_targets; + /* - * Give demultiplex thread up to 10 seconds to reconnect, should be - * greater than cifs socket timeout which is 7 seconds + * Give demultiplex thread up to 10 seconds to each target available for + * reconnect -- should be greater than cifs socket timeout which is 7 + * seconds. */ while (server->tcpStatus == CifsNeedReconnect) { rc = wait_event_interruptible_timeout(server->response_q, @@ -170,6 +257,9 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) if (server->tcpStatus != CifsNeedReconnect) break; + if (--retries) + continue; + /* * on "soft" mounts we wait once. Hard mounts keep * retrying until process is killed or server comes @@ -179,6 +269,7 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); return -EHOSTDOWN; } + retries = server->nr_targets; } if (!ses->need_reconnect && !tcon->need_reconnect) @@ -214,7 +305,7 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) } cifs_mark_open_files_invalid(tcon); - rc = CIFSTCon(0, ses, tcon->treeName, tcon, nls_codepage); + rc = __cifs_reconnect_tcon(nls_codepage, tcon); mutex_unlock(&ses->session_mutex); cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); @@ -1458,18 +1549,26 @@ cifs_discard_remaining_data(struct TCP_Server_Info *server) } static int -cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) +__cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid, + bool malformed) { int length; - struct cifs_readdata *rdata = mid->callback_data; length = cifs_discard_remaining_data(server); - dequeue_mid(mid, rdata->result); + dequeue_mid(mid, malformed); mid->resp_buf = server->smallbuf; server->smallbuf = NULL; return length; } +static int +cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) +{ + struct cifs_readdata *rdata = mid->callback_data; + + return __cifs_readv_discard(server, mid, rdata->result); +} + int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) { @@ -1511,12 +1610,23 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) return -1; } + /* set up first two iov for signature check and to get credits */ + rdata->iov[0].iov_base = buf; + rdata->iov[0].iov_len = 4; + rdata->iov[1].iov_base = buf + 4; + rdata->iov[1].iov_len = server->total_read - 4; + cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", + rdata->iov[0].iov_base, rdata->iov[0].iov_len); + cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", + rdata->iov[1].iov_base, rdata->iov[1].iov_len); + /* Was the SMB read successful? */ rdata->result = server->ops->map_error(buf, false); if (rdata->result != 0) { cifs_dbg(FYI, "%s: server returned error %d\n", __func__, rdata->result); - return cifs_readv_discard(server, mid); + /* normal error on read response */ + return __cifs_readv_discard(server, mid, false); } /* Is there enough to get to the rest of the READ_RSP header? */ @@ -1560,14 +1670,6 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) server->total_read += length; } - /* set up first iov for signature check */ - rdata->iov[0].iov_base = buf; - rdata->iov[0].iov_len = 4; - rdata->iov[1].iov_base = buf + 4; - rdata->iov[1].iov_len = server->total_read - 4; - cifs_dbg(FYI, "0: iov_base=%p iov_len=%u\n", - rdata->iov[0].iov_base, server->total_read); - /* how much data is in the response? */ #ifdef CONFIG_CIFS_SMB_DIRECT use_rdma_mr = rdata->mr; @@ -1607,6 +1709,7 @@ cifs_readv_callback(struct mid_q_entry *mid) struct smb_rqst rqst = { .rq_iov = rdata->iov, .rq_nvec = 2, .rq_pages = rdata->pages, + .rq_offset = rdata->page_offset, .rq_npages = rdata->nr_pages, .rq_pagesz = rdata->pagesz, .rq_tailsz = rdata->tailsz }; @@ -2031,7 +2134,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata) for (j = 0; j < nr_pages; j++) { unlock_page(wdata2->pages[j]); - if (rc != 0 && rc != -EAGAIN) { + if (rc != 0 && !is_retryable_error(rc)) { SetPageError(wdata2->pages[j]); end_page_writeback(wdata2->pages[j]); put_page(wdata2->pages[j]); @@ -2040,7 +2143,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata) if (rc) { kref_put(&wdata2->refcount, cifs_writedata_release); - if (rc == -EAGAIN) + if (is_retryable_error(rc)) continue; break; } @@ -2049,7 +2152,8 @@ cifs_writev_requeue(struct cifs_writedata *wdata) i += nr_pages; } while (i < wdata->nr_pages); - mapping_set_error(inode->i_mapping, rc); + if (rc != 0 && !is_retryable_error(rc)) + mapping_set_error(inode->i_mapping, rc); kref_put(&wdata->refcount, cifs_writedata_release); } @@ -2210,6 +2314,7 @@ cifs_async_writev(struct cifs_writedata *wdata, rqst.rq_iov = iov; rqst.rq_nvec = 2; rqst.rq_pages = wdata->pages; + rqst.rq_offset = wdata->page_offset; rqst.rq_npages = wdata->nr_pages; rqst.rq_pagesz = wdata->pagesz; rqst.rq_tailsz = wdata->tailsz; @@ -5027,6 +5132,13 @@ oldQFSInfoRetry: le16_to_cpu(response_data->BytesPerSector) * le32_to_cpu(response_data-> SectorsPerAllocationUnit); + /* + * much prefer larger but if server doesn't report + * a valid size than 4K is a reasonable minimum + */ + if (FSData->f_bsize < 512) + FSData->f_bsize = 4096; + FSData->f_blocks = le32_to_cpu(response_data->TotalAllocationUnits); FSData->f_bfree = FSData->f_bavail = @@ -5107,6 +5219,13 @@ QFSInfoRetry: le32_to_cpu(response_data->BytesPerSector) * le32_to_cpu(response_data-> SectorsPerAllocationUnit); + /* + * much prefer larger but if server doesn't report + * a valid size than 4K is a reasonable minimum + */ + if (FSData->f_bsize < 512) + FSData->f_bsize = 4096; + FSData->f_blocks = le64_to_cpu(response_data->TotalAllocationUnits); FSData->f_bfree = FSData->f_bavail = @@ -5470,6 +5589,13 @@ QFSPosixRetry: data_offset); FSData->f_bsize = le32_to_cpu(response_data->BlockSize); + /* + * much prefer larger but if server doesn't report + * a valid size than 4K is a reasonable minimum + */ + if (FSData->f_bsize < 512) + FSData->f_bsize = 4096; + FSData->f_blocks = le64_to_cpu(response_data->TotalBlocks); FSData->f_bfree = |