From 43e51b39892e1742a22c3fb61c4e8afc6a09edc0 Mon Sep 17 00:00:00 2001 From: Volker Lendecke Date: Sat, 16 Jun 2007 18:07:44 +0000 Subject: r23522: Save us a kilobyte stack space in a hot code path: I can't see a reason why check_path_syntax should not be able to run in-line. The destination pointer either walks side by side with the source pointer or is decremented. So as far as I can see s>=d is true throughout the whole routine. Jeremy, I'm checking this only into 3_0 for now. Please review and ack or directly merge this to 3_0_26. Thanks, Volker (This used to be commit 34a13c82a3b72d6900614b57c58fbaefeeca8fa7) --- source3/smbd/reply.c | 53 +++++++++++++++++++++++----------------------------- 1 file changed, 23 insertions(+), 30 deletions(-) (limited to 'source3/smbd/reply.c') diff --git a/source3/smbd/reply.c b/source3/smbd/reply.c index 72a3f5da8e..b826cc7bda 100644 --- a/source3/smbd/reply.c +++ b/source3/smbd/reply.c @@ -47,13 +47,12 @@ extern BOOL global_encrypted_passwords_negotiated; /* Custom version for processing POSIX paths. */ #define IS_PATH_SEP(c,posix_only) ((c) == '/' || (!(posix_only) && (c) == '\\')) -NTSTATUS check_path_syntax_internal(pstring destname, - const pstring srcname, - BOOL posix_path, - BOOL *p_last_component_contains_wcard) +static NTSTATUS check_path_syntax_internal(char *path, + BOOL posix_path, + BOOL *p_last_component_contains_wcard) { - char *d = destname; - const char *s = srcname; + char *d = path; + const char *s = path; NTSTATUS ret = NT_STATUS_OK; BOOL start_of_name_component = True; @@ -69,7 +68,7 @@ NTSTATUS check_path_syntax_internal(pstring destname, while (IS_PATH_SEP(*s,posix_path)) { s++; } - if ((d != destname) && (*s != '\0')) { + if ((d != path) && (*s != '\0')) { /* We only care about non-leading or trailing '/' or '\\' */ *d++ = '/'; } @@ -89,13 +88,13 @@ NTSTATUS check_path_syntax_internal(pstring destname, */ /* If we just added a '/' - delete it */ - if ((d > destname) && (*(d-1) == '/')) { + if ((d > path) && (*(d-1) == '/')) { *(d-1) = '\0'; d--; } /* Are we at the start ? Can't go back further if so. */ - if (d <= destname) { + if (d <= path) { ret = NT_STATUS_OBJECT_PATH_SYNTAX_BAD; break; } @@ -103,7 +102,7 @@ NTSTATUS check_path_syntax_internal(pstring destname, /* We know this is safe as '/' cannot be part of a mb sequence. */ /* NOTE - if this assumption is invalid we are not in good shape... */ /* Decrement d first as d points to the *next* char to write into. */ - for (d--; d > destname; d--) { + for (d--; d > path; d--) { if (*d == '/') break; } @@ -177,10 +176,10 @@ NTSTATUS check_path_syntax_internal(pstring destname, No wildcards allowed. ****************************************************************************/ -NTSTATUS check_path_syntax(pstring destname, const pstring srcname) +NTSTATUS check_path_syntax(char *path) { BOOL ignore; - return check_path_syntax_internal(destname, srcname, False, &ignore); + return check_path_syntax_internal(path, False, &ignore); } /**************************************************************************** @@ -189,9 +188,9 @@ NTSTATUS check_path_syntax(pstring destname, const pstring srcname) a wildcard. ****************************************************************************/ -NTSTATUS check_path_syntax_wcard(pstring destname, const pstring srcname, BOOL *p_contains_wcard) +NTSTATUS check_path_syntax_wcard(char *path, BOOL *p_contains_wcard) { - return check_path_syntax_internal(destname, srcname, False, p_contains_wcard); + return check_path_syntax_internal(path, False, p_contains_wcard); } /**************************************************************************** @@ -200,10 +199,10 @@ NTSTATUS check_path_syntax_wcard(pstring destname, const pstring srcname, BOOL * set (a safe assumption). ****************************************************************************/ -NTSTATUS check_path_syntax_posix(pstring destname, const pstring srcname) +NTSTATUS check_path_syntax_posix(char *name) { BOOL ignore; - return check_path_syntax_internal(destname, srcname, True, &ignore); + return check_path_syntax_internal(path, True, &ignore); } /**************************************************************************** @@ -213,17 +212,15 @@ NTSTATUS check_path_syntax_posix(pstring destname, const pstring srcname) size_t srvstr_get_path_wcard(char *inbuf, char *dest, const char *src, size_t dest_len, size_t src_len, int flags, NTSTATUS *err, BOOL *contains_wcard) { - pstring tmppath; - char *tmppath_ptr = tmppath; size_t ret; #ifdef DEVELOPER SMB_ASSERT(dest_len == sizeof(pstring)); #endif if (src_len == 0) { - ret = srvstr_pull_buf( inbuf, tmppath_ptr, src, dest_len, flags); + ret = srvstr_pull_buf( inbuf, dest, src, dest_len, flags); } else { - ret = srvstr_pull( inbuf, tmppath_ptr, src, dest_len, src_len, flags); + ret = srvstr_pull( inbuf, dest, src, dest_len, src_len, flags); } *contains_wcard = False; @@ -233,15 +230,14 @@ size_t srvstr_get_path_wcard(char *inbuf, char *dest, const char *src, size_t de * For a DFS path the function parse_dfs_path() * will do the path processing, just make a copy. */ - pstrcpy(dest, tmppath); *err = NT_STATUS_OK; return ret; } if (lp_posix_pathnames()) { - *err = check_path_syntax_posix(dest, tmppath); + *err = check_path_syntax_posix(dest); } else { - *err = check_path_syntax_wcard(dest, tmppath, contains_wcard); + *err = check_path_syntax_wcard(dest, contains_wcard); } return ret; @@ -253,17 +249,15 @@ size_t srvstr_get_path_wcard(char *inbuf, char *dest, const char *src, size_t de size_t srvstr_get_path(char *inbuf, char *dest, const char *src, size_t dest_len, size_t src_len, int flags, NTSTATUS *err) { - pstring tmppath; - char *tmppath_ptr = tmppath; size_t ret; #ifdef DEVELOPER SMB_ASSERT(dest_len == sizeof(pstring)); #endif if (src_len == 0) { - ret = srvstr_pull_buf( inbuf, tmppath_ptr, src, dest_len, flags); + ret = srvstr_pull_buf( inbuf, dest, src, dest_len, flags); } else { - ret = srvstr_pull( inbuf, tmppath_ptr, src, dest_len, src_len, flags); + ret = srvstr_pull( inbuf, dest, src, dest_len, src_len, flags); } if (SVAL(inbuf,smb_flg2) & FLAGS2_DFS_PATHNAMES) { @@ -271,15 +265,14 @@ size_t srvstr_get_path(char *inbuf, char *dest, const char *src, size_t dest_len * For a DFS path the function parse_dfs_path() * will do the path processing, just make a copy. */ - pstrcpy(dest, tmppath); *err = NT_STATUS_OK; return ret; } if (lp_posix_pathnames()) { - *err = check_path_syntax_posix(dest, tmppath); + *err = check_path_syntax_posix(dest); } else { - *err = check_path_syntax(dest, tmppath); + *err = check_path_syntax(dest); } return ret; -- cgit