From 869f24e0b1915ec8d3e14f8850417474200e687e Mon Sep 17 00:00:00 2001 From: Samba Release Account Date: Wed, 15 Jan 1997 01:53:25 +0000 Subject: locking.c proto.h shmem.c smb.h status.c : Changed shm_ prefixes to smb_shm_ prefixes as shm_ is a POSIX.4 prefix. Updated fd code in FAST_SHARE_MODE code to work with new fd indirection. quotas.c: Fixed #ifdef not on position zero. Jeremy. (jra@cygnus.com). (This used to be commit c9a9d56642cc34369a42f48a28116e466240d303) --- source3/locking/shmem.c | 458 ++++++++++++++++++++++++------------------------ 1 file changed, 229 insertions(+), 229 deletions(-) (limited to 'source3/locking/shmem.c') diff --git a/source3/locking/shmem.c b/source3/locking/shmem.c index e17cf1aa8d..9f7b985e67 100644 --- a/source3/locking/shmem.c +++ b/source3/locking/shmem.c @@ -29,68 +29,68 @@ extern int DEBUGLEVEL; -#define SHM_MAGIC 0x53484100 +#define SMB_SHM_MAGIC 0x53484100 /* = "SHM" in hex */ -#define SHM_VERSION 1 +#define SMB_SHM_VERSION 1 /* WARNING : offsets are used because mmap() does not guarantee that all processes have the shared memory mapped to the same address */ -struct ShmHeader +struct SmbShmHeader { - int shm_magic; - int shm_version; + int smb_shm_magic; + int smb_shm_version; int total_size; /* in bytes */ BOOL consistent; - shm_offset_t first_free_off; - shm_offset_t userdef_off; /* a userdefined offset. can be used to store root of tree or list */ - struct { /* a cell is a range of bytes of sizeof(struct ShmBlockDesc) size */ + smb_shm_offset_t first_free_off; + smb_shm_offset_t userdef_off; /* a userdefined offset. can be used to store root of tree or list */ + struct { /* a cell is a range of bytes of sizeof(struct SmbShmBlockDesc) size */ int cells_free; int cells_used; int cells_system; /* number of cells used as allocated block descriptors */ } statistics; }; -#define SHM_NOT_FREE_OFF (-1) -struct ShmBlockDesc +#define SMB_SHM_NOT_FREE_OFF (-1) +struct SmbShmBlockDesc { - shm_offset_t next; /* offset of next block in the free list or SHM_NOT_FREE_OFF when block in use */ + smb_shm_offset_t next; /* offset of next block in the free list or SMB_SHM_NOT_FREE_OFF when block in use */ int size; /* user size in BlockDescSize units */ }; -#define EOList_Addr (struct ShmBlockDesc *)( 0 ) +#define EOList_Addr (struct SmbShmBlockDesc *)( 0 ) #define EOList_Off (NULL_OFFSET) -#define CellSize sizeof(struct ShmBlockDesc) +#define CellSize sizeof(struct SmbShmBlockDesc) /* HeaderSize aligned on 8 byte boundary */ -#define AlignedHeaderSize ((sizeof(struct ShmHeader)+7) & ~7) +#define AlignedHeaderSize ((sizeof(struct SmbShmHeader)+7) & ~7) -static int shm_fd = -1; -static pstring shm_processreg_name = ""; +static int smb_shm_fd = -1; +static pstring smb_shm_processreg_name = ""; -static struct ShmHeader *shm_header_p = (struct ShmHeader *)0; -static int shm_times_locked = 0; +static struct SmbShmHeader *smb_shm_header_p = (struct SmbShmHeader *)0; +static int smb_shm_times_locked = 0; -static BOOL shm_register_process(char *processreg_file, pid_t pid, BOOL *other_processes) +static BOOL smb_shm_register_process(char *processreg_file, pid_t pid, BOOL *other_processes) { - int shm_processes_fd = -1; + int smb_shm_processes_fd = -1; int nb_read; pid_t other_pid; int free_slot = -1; int erased_slot; - shm_processes_fd = open(processreg_file, O_RDWR | O_CREAT, 0666); - if ( shm_processes_fd < 0 ) + smb_shm_processes_fd = open(processreg_file, O_RDWR | O_CREAT, 0666); + if ( smb_shm_processes_fd < 0 ) { - DEBUG(0,("ERROR shm_register_process : processreg_file open failed with code %d\n",errno)); + DEBUG(0,("ERROR smb_shm_register_process : processreg_file open failed with code %d\n",errno)); return False; } *other_processes = False; - while ((nb_read = read(shm_processes_fd, &other_pid, sizeof(other_pid))) > 0) + while ((nb_read = read(smb_shm_processes_fd, &other_pid, sizeof(other_pid))) > 0) { if(other_pid) { @@ -99,46 +99,46 @@ static BOOL shm_register_process(char *processreg_file, pid_t pid, BOOL *other_p else { /* erase old pid */ - DEBUG(2,("shm_register_process : erasing stale record for pid %d\n",other_pid)); + DEBUG(2,("smb_shm_register_process : erasing stale record for pid %d\n",other_pid)); other_pid = (pid_t)0; - erased_slot = lseek(shm_processes_fd, -sizeof(other_pid), SEEK_CUR); - write(shm_processes_fd, &other_pid, sizeof(other_pid)); + erased_slot = lseek(smb_shm_processes_fd, -sizeof(other_pid), SEEK_CUR); + write(smb_shm_processes_fd, &other_pid, sizeof(other_pid)); if(free_slot < 0) free_slot = erased_slot; } } else if(free_slot < 0) - free_slot = lseek(shm_processes_fd, -sizeof(other_pid), SEEK_CUR); + free_slot = lseek(smb_shm_processes_fd, -sizeof(other_pid), SEEK_CUR); } if (nb_read < 0) { - DEBUG(0,("ERROR shm_register_process : processreg_file read failed with code %d\n",errno)); - close(shm_processes_fd); + DEBUG(0,("ERROR smb_shm_register_process : processreg_file read failed with code %d\n",errno)); + close(smb_shm_processes_fd); return False; } if(free_slot < 0) - free_slot = lseek(shm_processes_fd, 0, SEEK_END); + free_slot = lseek(smb_shm_processes_fd, 0, SEEK_END); - DEBUG(2,("shm_register_process : writing record for pid %d at offset %d\n",pid,free_slot)); - lseek(shm_processes_fd, free_slot, SEEK_SET); - if(write(shm_processes_fd, &pid, sizeof(pid)) < 0) + DEBUG(2,("smb_shm_register_process : writing record for pid %d at offset %d\n",pid,free_slot)); + lseek(smb_shm_processes_fd, free_slot, SEEK_SET); + if(write(smb_shm_processes_fd, &pid, sizeof(pid)) < 0) { - DEBUG(0,("ERROR shm_register_process : processreg_file write failed with code %d\n",errno)); - close(shm_processes_fd); + DEBUG(0,("ERROR smb_shm_register_process : processreg_file write failed with code %d\n",errno)); + close(smb_shm_processes_fd); return False; } - close(shm_processes_fd); + close(smb_shm_processes_fd); return True; } -static BOOL shm_unregister_process(char *processreg_file, pid_t pid) +static BOOL smb_shm_unregister_process(char *processreg_file, pid_t pid) { int old_umask; - int shm_processes_fd = -1; + int smb_shm_processes_fd = -1; int nb_read; pid_t other_pid; int erased_slot; @@ -146,26 +146,26 @@ static BOOL shm_unregister_process(char *processreg_file, pid_t pid) old_umask = umask(0); - shm_processes_fd = open(processreg_file, O_RDWR); + smb_shm_processes_fd = open(processreg_file, O_RDWR); umask(old_umask); - if ( shm_processes_fd < 0 ) + if ( smb_shm_processes_fd < 0 ) { - DEBUG(0,("ERROR shm_unregister_process : processreg_file open failed with code %d\n",errno)); + DEBUG(0,("ERROR smb_shm_unregister_process : processreg_file open failed with code %d\n",errno)); return False; } - while ((nb_read = read(shm_processes_fd, &other_pid, sizeof(other_pid))) > 0) + while ((nb_read = read(smb_shm_processes_fd, &other_pid, sizeof(other_pid))) > 0) { if(other_pid == pid) { /* erase pid */ - DEBUG(2,("shm_unregister_process : erasing record for pid %d\n",other_pid)); + DEBUG(2,("smb_shm_unregister_process : erasing record for pid %d\n",other_pid)); other_pid = (pid_t)0; - erased_slot = lseek(shm_processes_fd, -sizeof(other_pid), SEEK_CUR); - if(write(shm_processes_fd, &other_pid, sizeof(other_pid)) < 0) + erased_slot = lseek(smb_shm_processes_fd, -sizeof(other_pid), SEEK_CUR); + if(write(smb_shm_processes_fd, &other_pid, sizeof(other_pid)) < 0) { - DEBUG(0,("ERROR shm_unregister_process : processreg_file write failed with code %d\n",errno)); - close(shm_processes_fd); + DEBUG(0,("ERROR smb_shm_unregister_process : processreg_file write failed with code %d\n",errno)); + close(smb_shm_processes_fd); return False; } @@ -175,146 +175,146 @@ static BOOL shm_unregister_process(char *processreg_file, pid_t pid) } if (nb_read < 0) { - DEBUG(0,("ERROR shm_unregister_process : processreg_file read failed with code %d\n",errno)); - close(shm_processes_fd); + DEBUG(0,("ERROR smb_shm_unregister_process : processreg_file read failed with code %d\n",errno)); + close(smb_shm_processes_fd); return False; } if(!found) { - DEBUG(0,("ERROR shm_unregister_process : couldn't find pid %d in file %s\n",pid,processreg_file)); - close(shm_processes_fd); + DEBUG(0,("ERROR smb_shm_unregister_process : couldn't find pid %d in file %s\n",pid,processreg_file)); + close(smb_shm_processes_fd); return False; } - close(shm_processes_fd); + close(smb_shm_processes_fd); return True; } -static BOOL shm_validate_header(int size) +static BOOL smb_shm_validate_header(int size) { - if( !shm_header_p ) + if( !smb_shm_header_p ) { /* not mapped yet */ - DEBUG(0,("ERROR shm_validate_header : shmem not mapped\n")); + DEBUG(0,("ERROR smb_shm_validate_header : shmem not mapped\n")); return False; } - if(shm_header_p->shm_magic != SHM_MAGIC) + if(smb_shm_header_p->smb_shm_magic != SMB_SHM_MAGIC) { - DEBUG(0,("ERROR shm_validate_header : bad magic\n")); + DEBUG(0,("ERROR smb_shm_validate_header : bad magic\n")); return False; } - if(shm_header_p->shm_version != SHM_VERSION) + if(smb_shm_header_p->smb_shm_version != SMB_SHM_VERSION) { - DEBUG(0,("ERROR shm_validate_header : bad version %X\n",shm_header_p->shm_version)); + DEBUG(0,("ERROR smb_shm_validate_header : bad version %X\n",smb_shm_header_p->smb_shm_version)); return False; } - if(shm_header_p->total_size != size) + if(smb_shm_header_p->total_size != size) { - DEBUG(0,("ERROR shm_validate_header : shmem size mismatch (old = %d, new = %d)\n",shm_header_p->total_size,size)); + DEBUG(0,("ERROR smb_shm_validate_header : shmem size mismatch (old = %d, new = %d)\n",smb_shm_header_p->total_size,size)); return False; } - if(!shm_header_p->consistent) + if(!smb_shm_header_p->consistent) { - DEBUG(0,("ERROR shm_validate_header : shmem not consistent\n")); + DEBUG(0,("ERROR smb_shm_validate_header : shmem not consistent\n")); return False; } return True; } -static BOOL shm_initialize(int size) +static BOOL smb_shm_initialize(int size) { - struct ShmBlockDesc * first_free_block_p; + struct SmbShmBlockDesc * first_free_block_p; - DEBUG(2,("shm_initialize : initializing shmem file of size %d\n",size)); + DEBUG(2,("smb_shm_initialize : initializing shmem file of size %d\n",size)); - if( !shm_header_p ) + if( !smb_shm_header_p ) { /* not mapped yet */ - DEBUG(0,("ERROR shm_initialize : shmem not mapped\n")); + DEBUG(0,("ERROR smb_shm_initialize : shmem not mapped\n")); return False; } - shm_header_p->shm_magic = SHM_MAGIC; - shm_header_p->shm_version = SHM_VERSION; - shm_header_p->total_size = size; - shm_header_p->first_free_off = AlignedHeaderSize; - shm_header_p->userdef_off = NULL_OFFSET; + smb_shm_header_p->smb_shm_magic = SMB_SHM_MAGIC; + smb_shm_header_p->smb_shm_version = SMB_SHM_VERSION; + smb_shm_header_p->total_size = size; + smb_shm_header_p->first_free_off = AlignedHeaderSize; + smb_shm_header_p->userdef_off = NULL_OFFSET; - first_free_block_p = (struct ShmBlockDesc *)shm_offset2addr(shm_header_p->first_free_off); + first_free_block_p = (struct SmbShmBlockDesc *)smb_shm_offset2addr(smb_shm_header_p->first_free_off); first_free_block_p->next = EOList_Off; first_free_block_p->size = ( size - AlignedHeaderSize - CellSize ) / CellSize ; - shm_header_p->statistics.cells_free = first_free_block_p->size; - shm_header_p->statistics.cells_used = 0; - shm_header_p->statistics.cells_system = 1; + smb_shm_header_p->statistics.cells_free = first_free_block_p->size; + smb_shm_header_p->statistics.cells_used = 0; + smb_shm_header_p->statistics.cells_system = 1; - shm_header_p->consistent = True; + smb_shm_header_p->consistent = True; return True; } -static void shm_solve_neighbors(struct ShmBlockDesc *head_p ) +static void smb_shm_solve_neighbors(struct SmbShmBlockDesc *head_p ) { - struct ShmBlockDesc *next_p; + struct SmbShmBlockDesc *next_p; /* Check if head_p and head_p->next are neighbors and if so join them */ if ( head_p == EOList_Addr ) return ; if ( head_p->next == EOList_Off ) return ; - next_p = (struct ShmBlockDesc *)shm_offset2addr(head_p->next); + next_p = (struct SmbShmBlockDesc *)smb_shm_offset2addr(head_p->next); if ( ( head_p + head_p->size + 1 ) == next_p) { head_p->size += next_p->size +1 ; /* adapt size */ head_p->next = next_p->next ; /* link out */ - shm_header_p->statistics.cells_free += 1; - shm_header_p->statistics.cells_system -= 1; + smb_shm_header_p->statistics.cells_free += 1; + smb_shm_header_p->statistics.cells_system -= 1; } } -BOOL shm_open( char *file_name, int size) +BOOL smb_shm_open( char *file_name, int size) { int filesize; BOOL created_new = False; BOOL other_processes = True; int old_umask; - DEBUG(2,("shm_open : using shmem file %s to be of size %d\n",file_name,size)); + DEBUG(2,("smb_shm_open : using shmem file %s to be of size %d\n",file_name,size)); old_umask = umask(0); - shm_fd = open(file_name, O_RDWR | O_CREAT, 0666); + smb_shm_fd = open(file_name, O_RDWR | O_CREAT, 0666); umask(old_umask); - if ( shm_fd < 0 ) + if ( smb_shm_fd < 0 ) { - DEBUG(0,("ERROR shm_open : open failed with code %d\n",errno)); + DEBUG(0,("ERROR smb_shm_open : open failed with code %d\n",errno)); return False; } - if (!shm_lock()) + if (!smb_shm_lock()) { - DEBUG(0,("ERROR shm_open : can't do shm_lock\n")); + DEBUG(0,("ERROR smb_shm_open : can't do smb_shm_lock\n")); return False; } - if( (filesize = lseek(shm_fd, 0, SEEK_END)) < 0) + if( (filesize = lseek(smb_shm_fd, 0, SEEK_END)) < 0) { - DEBUG(0,("ERROR shm_open : lseek failed with code %d\n",errno)); - shm_unlock(); - close(shm_fd); + DEBUG(0,("ERROR smb_shm_open : lseek failed with code %d\n",errno)); + smb_shm_unlock(); + close(smb_shm_fd); return False; } /* return the file offset to 0 to save on later seeks */ - lseek(shm_fd,0,SEEK_SET); + lseek(smb_shm_fd,0,SEEK_SET); if (filesize == 0) { @@ -327,30 +327,30 @@ BOOL shm_open( char *file_name, int size) */ /* construct processreg file name */ - strcpy(shm_processreg_name, file_name); - strcat(shm_processreg_name, ".processes"); + strcpy(smb_shm_processreg_name, file_name); + strcat(smb_shm_processreg_name, ".processes"); - if (! shm_register_process(shm_processreg_name, getpid(), &other_processes)) + if (! smb_shm_register_process(smb_shm_processreg_name, getpid(), &other_processes)) { - shm_unlock(); - close(shm_fd); + smb_shm_unlock(); + close(smb_shm_fd); return False; } if (created_new || !other_processes) { /* we just created a new one, or are the first opener, lets set it size */ - if( ftruncate(shm_fd, size) <0) + if( ftruncate(smb_shm_fd, size) <0) { - DEBUG(0,("ERROR shm_open : ftruncate failed with code %d\n",errno)); - shm_unregister_process(shm_processreg_name, getpid()); - shm_unlock(); - close(shm_fd); + DEBUG(0,("ERROR smb_shm_open : ftruncate failed with code %d\n",errno)); + smb_shm_unregister_process(smb_shm_processreg_name, getpid()); + smb_shm_unlock(); + close(smb_shm_fd); return False; } /* paranoia */ - lseek(shm_fd,0,SEEK_SET); + lseek(smb_shm_fd,0,SEEK_SET); filesize = size; } @@ -359,88 +359,88 @@ BOOL shm_open( char *file_name, int size) { /* the existing file has a different size and we are not the first opener. Since another process is still using it, we will use the file size */ - DEBUG(0,("WARNING shm_open : filesize (%d) != expected size (%d), using filesize\n",filesize,size)); + DEBUG(0,("WARNING smb_shm_open : filesize (%d) != expected size (%d), using filesize\n",filesize,size)); size = filesize; } - shm_header_p = (struct ShmHeader *)mmap( NULL, size, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, shm_fd, 0); - /* WARNING, shm_header_p can be different for different processes mapping the same file ! */ - if (shm_header_p == (struct ShmHeader *)(-1)) + smb_shm_header_p = (struct SmbShmHeader *)mmap( NULL, size, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, smb_shm_fd, 0); + /* WARNING, smb_shm_header_p can be different for different processes mapping the same file ! */ + if (smb_shm_header_p == (struct SmbShmHeader *)(-1)) { - DEBUG(0,("ERROR shm_open : mmap failed with code %d\n",errno)); - shm_unregister_process(shm_processreg_name, getpid()); - shm_unlock(); - close(shm_fd); + DEBUG(0,("ERROR smb_shm_open : mmap failed with code %d\n",errno)); + smb_shm_unregister_process(smb_shm_processreg_name, getpid()); + smb_shm_unlock(); + close(smb_shm_fd); return False; } if (created_new || !other_processes) { - shm_initialize(size); + smb_shm_initialize(size); } - else if (!shm_validate_header(size) ) + else if (!smb_shm_validate_header(size) ) { /* existing file is corrupt, samba admin should remove it by hand */ - DEBUG(0,("ERROR shm_open : corrupt shared mem file, remove it manually\n")); - munmap((caddr_t)shm_header_p, size); - shm_unregister_process(shm_processreg_name, getpid()); - shm_unlock(); - close(shm_fd); + DEBUG(0,("ERROR smb_shm_open : corrupt shared mem file, remove it manually\n")); + munmap((caddr_t)smb_shm_header_p, size); + smb_shm_unregister_process(smb_shm_processreg_name, getpid()); + smb_shm_unlock(); + close(smb_shm_fd); return False; } - shm_unlock(); + smb_shm_unlock(); return True; } -BOOL shm_close( void ) +BOOL smb_shm_close( void ) { - DEBUG(2,("shm_close\n")); - if(shm_times_locked > 0) - DEBUG(0,("WARNING shm_close : shmem was still locked %d times\n",shm_times_locked));; - if ( munmap((caddr_t)shm_header_p, shm_header_p->total_size) < 0) + DEBUG(2,("smb_shm_close\n")); + if(smb_shm_times_locked > 0) + DEBUG(0,("WARNING smb_shm_close : shmem was still locked %d times\n",smb_shm_times_locked));; + if ( munmap((caddr_t)smb_shm_header_p, smb_shm_header_p->total_size) < 0) { - DEBUG(0,("ERROR shm_close : munmap failed with code %d\n",errno)); + DEBUG(0,("ERROR smb_shm_close : munmap failed with code %d\n",errno)); } - shm_lock(); - shm_unregister_process(shm_processreg_name, getpid()); - shm_unlock(); + smb_shm_lock(); + smb_shm_unregister_process(smb_shm_processreg_name, getpid()); + smb_shm_unlock(); - close(shm_fd); + close(smb_shm_fd); - shm_fd = -1; - shm_processreg_name[0] = '\0'; + smb_shm_fd = -1; + smb_shm_processreg_name[0] = '\0'; - shm_header_p = (struct ShmHeader *)0; - shm_times_locked = 0; + smb_shm_header_p = (struct SmbShmHeader *)0; + smb_shm_times_locked = 0; return True; } -shm_offset_t shm_alloc(int size) +smb_shm_offset_t smb_shm_alloc(int size) { unsigned num_cells ; - struct ShmBlockDesc *scanner_p; - struct ShmBlockDesc *prev_p; - struct ShmBlockDesc *new_p; - shm_offset_t result_offset; + struct SmbShmBlockDesc *scanner_p; + struct SmbShmBlockDesc *prev_p; + struct SmbShmBlockDesc *new_p; + smb_shm_offset_t result_offset; - if( !shm_header_p ) + if( !smb_shm_header_p ) { /* not mapped yet */ - DEBUG(0,("ERROR shm_alloc : shmem not mapped\n")); + DEBUG(0,("ERROR smb_shm_alloc : shmem not mapped\n")); return NULL_OFFSET; } - if( !shm_header_p->consistent) + if( !smb_shm_header_p->consistent) { - DEBUG(0,("ERROR shm_alloc : shmem not consistent\n")); + DEBUG(0,("ERROR smb_shm_alloc : shmem not consistent\n")); return NULL_OFFSET; } @@ -449,25 +449,25 @@ shm_offset_t shm_alloc(int size) num_cells = (size + CellSize -1) / CellSize; /* set start of scan */ - prev_p = (struct ShmBlockDesc *)shm_offset2addr(shm_header_p->first_free_off); + prev_p = (struct SmbShmBlockDesc *)smb_shm_offset2addr(smb_shm_header_p->first_free_off); scanner_p = prev_p ; /* scan the free list to find a matching free space */ while ( ( scanner_p != EOList_Addr ) && ( scanner_p->size < num_cells ) ) { prev_p = scanner_p; - scanner_p = (struct ShmBlockDesc *)shm_offset2addr(scanner_p->next); + scanner_p = (struct SmbShmBlockDesc *)smb_shm_offset2addr(scanner_p->next); } /* at this point scanner point to a block header or to the end of the list */ if ( scanner_p == EOList_Addr ) { - DEBUG(0,("ERROR shm_alloc : alloc of %d bytes failed, no free space found\n",size)); + DEBUG(0,("ERROR smb_shm_alloc : alloc of %d bytes failed, no free space found\n",size)); return (NULL_OFFSET); } /* going to modify shared mem */ - shm_header_p->consistent = False; + smb_shm_header_p->consistent = False; /* if we found a good one : scanner == the good one */ if ( scanner_p->size <= num_cells + 2 ) @@ -477,14 +477,14 @@ shm_offset_t shm_alloc(int size) */ if ( prev_p == scanner_p ) { - shm_header_p->first_free_off = scanner_p->next ; + smb_shm_header_p->first_free_off = scanner_p->next ; } else { prev_p->next = scanner_p->next ; } - shm_header_p->statistics.cells_free -= scanner_p->size; - shm_header_p->statistics.cells_used += scanner_p->size; + smb_shm_header_p->statistics.cells_free -= scanner_p->size; + smb_shm_header_p->statistics.cells_used += scanner_p->size; } else { @@ -493,166 +493,166 @@ shm_offset_t shm_alloc(int size) new_p->size = scanner_p->size - num_cells - 1; new_p->next = scanner_p->next; scanner_p->size = num_cells; - scanner_p->next = shm_addr2offset(new_p); + scanner_p->next = smb_shm_addr2offset(new_p); if ( prev_p != scanner_p ) { - prev_p->next = shm_addr2offset(new_p) ; + prev_p->next = smb_shm_addr2offset(new_p) ; } else { - shm_header_p->first_free_off = shm_addr2offset(new_p) ; + smb_shm_header_p->first_free_off = smb_shm_addr2offset(new_p) ; } - shm_header_p->statistics.cells_free -= num_cells+1; - shm_header_p->statistics.cells_used += num_cells; - shm_header_p->statistics.cells_system += 1; + smb_shm_header_p->statistics.cells_free -= num_cells+1; + smb_shm_header_p->statistics.cells_used += num_cells; + smb_shm_header_p->statistics.cells_system += 1; } - result_offset = shm_addr2offset( &(scanner_p[1]) ); - scanner_p->next = SHM_NOT_FREE_OFF ; + result_offset = smb_shm_addr2offset( &(scanner_p[1]) ); + scanner_p->next = SMB_SHM_NOT_FREE_OFF ; /* end modification of shared mem */ - shm_header_p->consistent = True; + smb_shm_header_p->consistent = True; - DEBUG(2,("shm_alloc : request for %d bytes, allocated %d bytes at offset %d\n",size,scanner_p->size*CellSize,result_offset )); + DEBUG(2,("smb_shm_alloc : request for %d bytes, allocated %d bytes at offset %d\n",size,scanner_p->size*CellSize,result_offset )); return ( result_offset ); } -BOOL shm_free(shm_offset_t offset) +BOOL smb_shm_free(smb_shm_offset_t offset) { - struct ShmBlockDesc *header_p ; /* pointer to header of block to free */ - struct ShmBlockDesc *scanner_p ; /* used to scan the list */ - struct ShmBlockDesc *prev_p ; /* holds previous in the list */ + struct SmbShmBlockDesc *header_p ; /* pointer to header of block to free */ + struct SmbShmBlockDesc *scanner_p ; /* used to scan the list */ + struct SmbShmBlockDesc *prev_p ; /* holds previous in the list */ - if( !shm_header_p ) + if( !smb_shm_header_p ) { /* not mapped yet */ - DEBUG(0,("ERROR shm_free : shmem not mapped\n")); + DEBUG(0,("ERROR smb_shm_free : shmem not mapped\n")); return False; } - if( !shm_header_p->consistent) + if( !smb_shm_header_p->consistent) { - DEBUG(0,("ERROR shm_free : shmem not consistent\n")); + DEBUG(0,("ERROR smb_shm_free : shmem not consistent\n")); return False; } - header_p = ( (struct ShmBlockDesc *)shm_offset2addr(offset) - 1); /* make pointer to header of block */ + header_p = ( (struct SmbShmBlockDesc *)smb_shm_offset2addr(offset) - 1); /* make pointer to header of block */ - if (header_p->next != SHM_NOT_FREE_OFF) + if (header_p->next != SMB_SHM_NOT_FREE_OFF) { - DEBUG(0,("ERROR shm_free : bad offset (%d)\n",offset)); + DEBUG(0,("ERROR smb_shm_free : bad offset (%d)\n",offset)); return False; } /* find a place in the free_list to put the header in */ /* set scanner and previous pointer to start of list */ - prev_p = (struct ShmBlockDesc *)shm_offset2addr(shm_header_p->first_free_off); + prev_p = (struct SmbShmBlockDesc *)smb_shm_offset2addr(smb_shm_header_p->first_free_off); scanner_p = prev_p ; while ( ( scanner_p != EOList_Addr) && (scanner_p < header_p) ) /* while we didn't scan past its position */ { prev_p = scanner_p ; - scanner_p = (struct ShmBlockDesc *)shm_offset2addr(scanner_p->next); + scanner_p = (struct SmbShmBlockDesc *)smb_shm_offset2addr(scanner_p->next); } - shm_header_p->consistent = False; + smb_shm_header_p->consistent = False; - DEBUG(2,("shm_free : freeing %d bytes at offset %d\n",header_p->size*CellSize,offset)); + DEBUG(2,("smb_shm_free : freeing %d bytes at offset %d\n",header_p->size*CellSize,offset)); if ( scanner_p == prev_p ) { - shm_header_p->statistics.cells_free += header_p->size; - shm_header_p->statistics.cells_used -= header_p->size; + smb_shm_header_p->statistics.cells_free += header_p->size; + smb_shm_header_p->statistics.cells_used -= header_p->size; /* we must free it at the beginning of the list */ - shm_header_p->first_free_off = shm_addr2offset(header_p); /* set the free_list_pointer to this block_header */ + smb_shm_header_p->first_free_off = smb_shm_addr2offset(header_p); /* set the free_list_pointer to this block_header */ /* scanner is the one that was first in the list */ - header_p->next = shm_addr2offset(scanner_p); - shm_solve_neighbors( header_p ); /* if neighbors then link them */ + header_p->next = smb_shm_addr2offset(scanner_p); + smb_shm_solve_neighbors( header_p ); /* if neighbors then link them */ - shm_header_p->consistent = True; + smb_shm_header_p->consistent = True; return True; } else { - shm_header_p->statistics.cells_free += header_p->size; - shm_header_p->statistics.cells_used -= header_p->size; + smb_shm_header_p->statistics.cells_free += header_p->size; + smb_shm_header_p->statistics.cells_used -= header_p->size; - prev_p->next = shm_addr2offset(header_p); - header_p->next = shm_addr2offset(scanner_p); - shm_solve_neighbors(header_p) ; - shm_solve_neighbors(prev_p) ; + prev_p->next = smb_shm_addr2offset(header_p); + header_p->next = smb_shm_addr2offset(scanner_p); + smb_shm_solve_neighbors(header_p) ; + smb_shm_solve_neighbors(prev_p) ; - shm_header_p->consistent = True; + smb_shm_header_p->consistent = True; return True; } } -shm_offset_t shm_get_userdef_off(void) +smb_shm_offset_t smb_shm_get_userdef_off(void) { - if (!shm_header_p) + if (!smb_shm_header_p) return NULL_OFFSET; else - return shm_header_p->userdef_off; + return smb_shm_header_p->userdef_off; } -BOOL shm_set_userdef_off(shm_offset_t userdef_off) +BOOL smb_shm_set_userdef_off(smb_shm_offset_t userdef_off) { - if (!shm_header_p) + if (!smb_shm_header_p) return False; else - shm_header_p->userdef_off = userdef_off; + smb_shm_header_p->userdef_off = userdef_off; return True; } -void * shm_offset2addr(shm_offset_t offset) +void * smb_shm_offset2addr(smb_shm_offset_t offset) { if (offset == NULL_OFFSET ) return (void *)(0); - if (!shm_header_p) + if (!smb_shm_header_p) return (void *)(0); - return (void *)((char *)shm_header_p + offset ); + return (void *)((char *)smb_shm_header_p + offset ); } -shm_offset_t shm_addr2offset(void *addr) +smb_shm_offset_t smb_shm_addr2offset(void *addr) { if (!addr) return NULL_OFFSET; - if (!shm_header_p) + if (!smb_shm_header_p) return NULL_OFFSET; - return (shm_offset_t)((char *)addr - (char *)shm_header_p); + return (smb_shm_offset_t)((char *)addr - (char *)smb_shm_header_p); } -BOOL shm_lock(void) +BOOL smb_shm_lock(void) { - if (shm_fd < 0) + if (smb_shm_fd < 0) { - DEBUG(0,("ERROR shm_lock : bad shm_fd (%d)\n",shm_fd)); + DEBUG(0,("ERROR smb_shm_lock : bad smb_shm_fd (%d)\n",smb_shm_fd)); return False; } - shm_times_locked++; + smb_shm_times_locked++; - if(shm_times_locked > 1) + if(smb_shm_times_locked > 1) { - DEBUG(2,("shm_lock : locked %d times\n",shm_times_locked)); + DEBUG(2,("smb_shm_lock : locked %d times\n",smb_shm_times_locked)); return True; } - if (lockf(shm_fd, F_LOCK, 0) < 0) + if (lockf(smb_shm_fd, F_LOCK, 0) < 0) { - DEBUG(0,("ERROR shm_lock : lockf failed with code %d\n",errno)); - shm_times_locked--; + DEBUG(0,("ERROR smb_shm_lock : lockf failed with code %d\n",errno)); + smb_shm_times_locked--; return False; } @@ -662,32 +662,32 @@ BOOL shm_lock(void) -BOOL shm_unlock(void) +BOOL smb_shm_unlock(void) { - if (shm_fd < 0) + if (smb_shm_fd < 0) { - DEBUG(0,("ERROR shm_unlock : bad shm_fd (%d)\n",shm_fd)); + DEBUG(0,("ERROR smb_shm_unlock : bad smb_shm_fd (%d)\n",smb_shm_fd)); return False; } - if(shm_times_locked == 0) + if(smb_shm_times_locked == 0) { - DEBUG(0,("ERROR shm_unlock : shmem not locked\n",shm_fd)); + DEBUG(0,("ERROR smb_shm_unlock : shmem not locked\n",smb_shm_fd)); return False; } - shm_times_locked--; + smb_shm_times_locked--; - if(shm_times_locked > 0) + if(smb_shm_times_locked > 0) { - DEBUG(2,("shm_unlock : still locked %d times\n",shm_times_locked)); + DEBUG(2,("smb_shm_unlock : still locked %d times\n",smb_shm_times_locked)); return True; } - if (lockf(shm_fd, F_ULOCK, 0) < 0) + if (lockf(smb_shm_fd, F_ULOCK, 0) < 0) { - DEBUG(0,("ERROR shm_unlock : lockf failed with code %d\n",errno)); - shm_times_locked++; + DEBUG(0,("ERROR smb_shm_unlock : lockf failed with code %d\n",errno)); + smb_shm_times_locked++; return False; } @@ -696,19 +696,19 @@ BOOL shm_unlock(void) } -BOOL shm_get_usage(int *bytes_free, +BOOL smb_shm_get_usage(int *bytes_free, int *bytes_used, int *bytes_overhead) { - if( !shm_header_p ) + if( !smb_shm_header_p ) { /* not mapped yet */ - DEBUG(0,("ERROR shm_free : shmem not mapped\n")); + DEBUG(0,("ERROR smb_shm_free : shmem not mapped\n")); return False; } - *bytes_free = shm_header_p->statistics.cells_free * CellSize; - *bytes_used = shm_header_p->statistics.cells_used * CellSize; - *bytes_overhead = shm_header_p->statistics.cells_system * CellSize + AlignedHeaderSize; + *bytes_free = smb_shm_header_p->statistics.cells_free * CellSize; + *bytes_used = smb_shm_header_p->statistics.cells_used * CellSize; + *bytes_overhead = smb_shm_header_p->statistics.cells_system * CellSize + AlignedHeaderSize; return True; } -- cgit