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GET /api/patches/2225530/?format=api
{ "id": 2225530, "url": "http://patchwork.ozlabs.org/api/patches/2225530/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260421063955.99164-4-sprasad@microsoft.com/", "project": { "id": 12, "url": "http://patchwork.ozlabs.org/api/projects/12/?format=api", "name": "Linux CIFS Client", "link_name": "linux-cifs-client", "list_id": "linux-cifs.vger.kernel.org", "list_email": "linux-cifs@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260421063955.99164-4-sprasad@microsoft.com>", "list_archive_url": null, "date": "2026-04-21T06:39:52", "name": "[v2,4/7] cifs: define variable sized buffer for querydir responses", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "aaaf955d39d88076fd07aaf7c310fa5f054b7da1", "submitter": { "id": 79368, "url": "http://patchwork.ozlabs.org/api/people/79368/?format=api", "name": "Shyam Prasad N", "email": "nspmangalore@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260421063955.99164-4-sprasad@microsoft.com/mbox/", "series": [ { "id": 500744, "url": "http://patchwork.ozlabs.org/api/series/500744/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=500744", "date": "2026-04-21T06:39:49", "name": "[v2,1/7] cifs: change_conf needs to be called for session setup", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/500744/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2225530/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225530/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-cifs+bounces-10978-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-cifs@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=LXn/U81g;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; 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These are\nborrowed from server struct and are not sufficient for large-sized\nquery dir operations.\n\nWith this change we will now define a new buffer type specifically\nfor cifs_search_info to hold variable sized responses. These will\nbe allocated by kmalloc and freed by kfree.\n\nSigned-off-by: Shyam Prasad N <sprasad@microsoft.com>\n---\n fs/smb/client/cifsglob.h | 2 ++\n fs/smb/client/file.c | 2 ++\n fs/smb/client/readdir.c | 2 ++\n fs/smb/client/smb2pdu.c | 14 +++++++++++---\n 4 files changed, 17 insertions(+), 3 deletions(-)", "diff": "diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h\nindex 709e96e077916..8d089ba08e3e5 100644\n--- a/fs/smb/client/cifsglob.h\n+++ b/fs/smb/client/cifsglob.h\n@@ -1394,6 +1394,7 @@ struct cifs_search_info {\n \tbool emptyDir:1;\n \tbool unicode:1;\n \tbool smallBuf:1; /* so we know which buf_release function to call */\n+\tbool is_dynamic_buf:1; /* dynamically allocated buffer - can be variable size */\n };\n \n #define ACL_NO_MODE\t((umode_t)(-1))\n@@ -1907,6 +1908,7 @@ enum cifs_find_flags {\n #define CIFS_NO_BUFFER 0 /* Response buffer not returned */\n #define CIFS_SMALL_BUFFER 1\n #define CIFS_LARGE_BUFFER 2\n+#define CIFS_DYNAMIC_BUFFER 3 /* Dynamically allocated buffer */\n #define CIFS_IOVEC 4 /* array of response buffers */\n \n /* Type of Request to SendReceive2 */\ndiff --git a/fs/smb/client/file.c b/fs/smb/client/file.c\nindex a69e05f86d7e2..6a1419d59ed5a 100644\n--- a/fs/smb/client/file.c\n+++ b/fs/smb/client/file.c\n@@ -1546,6 +1546,8 @@ int cifs_closedir(struct inode *inode, struct file *file)\n \t\tcfile->srch_inf.ntwrk_buf_start = NULL;\n \t\tif (cfile->srch_inf.smallBuf)\n \t\t\tcifs_small_buf_release(buf);\n+\t\telse if (cfile->srch_inf.is_dynamic_buf)\n+\t\t\tkfree(buf);\n \t\telse\n \t\t\tcifs_buf_release(buf);\n \t}\ndiff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c\nindex be22bbc4a65a0..b50efd9b9e1d2 100644\n--- a/fs/smb/client/readdir.c\n+++ b/fs/smb/client/readdir.c\n@@ -732,6 +732,8 @@ find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,\n \t\t\tif (cfile->srch_inf.smallBuf)\n \t\t\t\tcifs_small_buf_release(cfile->srch_inf.\n \t\t\t\t\t\tntwrk_buf_start);\n+\t\t\telse if (cfile->srch_inf.is_dynamic_buf)\n+\t\t\t\tkfree(cfile->srch_inf.ntwrk_buf_start);\n \t\t\telse\n \t\t\t\tcifs_buf_release(cfile->srch_inf.\n \t\t\t\t\t\tntwrk_buf_start);\ndiff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c\nindex 5188218c25be4..49dca84b169e6 100644\n--- a/fs/smb/client/smb2pdu.c\n+++ b/fs/smb/client/smb2pdu.c\n@@ -5625,6 +5625,8 @@ smb2_parse_query_directory(struct cifs_tcon *tcon,\n \tif (srch_inf->ntwrk_buf_start) {\n \t\tif (srch_inf->smallBuf)\n \t\t\tcifs_small_buf_release(srch_inf->ntwrk_buf_start);\n+\t\telse if (srch_inf->is_dynamic_buf)\n+\t\t\tkfree(srch_inf->ntwrk_buf_start);\n \t\telse\n \t\t\tcifs_buf_release(srch_inf->ntwrk_buf_start);\n \t}\n@@ -5644,12 +5646,18 @@ smb2_parse_query_directory(struct cifs_tcon *tcon,\n \tcifs_dbg(FYI, \"num entries %d last_index %lld srch start %p srch end %p\\n\",\n \t\t srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,\n \t\t srch_inf->srch_entries_start, srch_inf->last_entry);\n-\tif (resp_buftype == CIFS_LARGE_BUFFER)\n+\tif (resp_buftype == CIFS_LARGE_BUFFER) {\n \t\tsrch_inf->smallBuf = false;\n-\telse if (resp_buftype == CIFS_SMALL_BUFFER)\n+\t\tsrch_inf->is_dynamic_buf = false;\n+\t} else if (resp_buftype == CIFS_SMALL_BUFFER) {\n \t\tsrch_inf->smallBuf = true;\n-\telse\n+\t\tsrch_inf->is_dynamic_buf = false;\n+\t} else if (resp_buftype == CIFS_DYNAMIC_BUFFER) {\n+\t\tsrch_inf->smallBuf = false;\n+\t\tsrch_inf->is_dynamic_buf = true;\n+\t} else {\n \t\tcifs_tcon_dbg(VFS, \"Invalid search buffer type\\n\");\n+\t}\n \n \treturn 0;\n }\n", "prefixes": [ "v2", "4/7" ] }