diff options
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/compat.c | 12 | ||||
| -rw-r--r-- | ipc/msg.c | 82 | ||||
| -rw-r--r-- | ipc/sem.c | 73 | ||||
| -rw-r--r-- | ipc/shm.c | 86 | ||||
| -rw-r--r-- | ipc/util.c | 156 | ||||
| -rw-r--r-- | ipc/util.h | 8 |
6 files changed, 248 insertions, 169 deletions
diff --git a/ipc/compat.c b/ipc/compat.c index 3881d564c66..1fe95f6659d 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -42,10 +42,10 @@ struct compat_msgbuf { struct compat_ipc_perm { key_t key; - compat_uid_t uid; - compat_gid_t gid; - compat_uid_t cuid; - compat_gid_t cgid; + __compat_uid_t uid; + __compat_gid_t gid; + __compat_uid_t cuid; + __compat_gid_t cgid; compat_mode_t mode; unsigned short seq; }; @@ -174,8 +174,8 @@ static inline int __put_compat_ipc_perm(struct ipc64_perm *p, struct compat_ipc_perm __user *up) { int err; - compat_uid_t u; - compat_gid_t g; + __compat_uid_t u; + __compat_gid_t g; err = __put_user(p->key, &up->key); SET_UID(u, p->uid); diff --git a/ipc/msg.c b/ipc/msg.c index 27e516f96cd..d035bd2aba9 100644 --- a/ipc/msg.c +++ b/ipc/msg.c @@ -26,6 +26,7 @@ #include <linux/sched.h> #include <linux/syscalls.h> #include <linux/audit.h> +#include <linux/seq_file.h> #include <asm/current.h> #include <asm/uaccess.h> #include "util.h" @@ -74,16 +75,16 @@ static struct ipc_ids msg_ids; static void freeque (struct msg_queue *msq, int id); static int newque (key_t key, int msgflg); #ifdef CONFIG_PROC_FS -static int sysvipc_msg_read_proc(char *buffer, char **start, off_t offset, int length, int *eof, void *data); +static int sysvipc_msg_proc_show(struct seq_file *s, void *it); #endif void __init msg_init (void) { ipc_init_ids(&msg_ids,msg_ctlmni); - -#ifdef CONFIG_PROC_FS - create_proc_read_entry("sysvipc/msg", 0, NULL, sysvipc_msg_read_proc, NULL); -#endif + ipc_init_proc_interface("sysvipc/msg", + " key msqid perms cbytes qnum lspid lrpid uid gid cuid cgid stime rtime ctime\n", + &msg_ids, + sysvipc_msg_proc_show); } static int newque (key_t key, int msgflg) @@ -113,6 +114,7 @@ static int newque (key_t key, int msgflg) return -ENOSPC; } + msq->q_id = msg_buildid(id,msq->q_perm.seq); msq->q_stime = msq->q_rtime = 0; msq->q_ctime = get_seconds(); msq->q_cbytes = msq->q_qnum = 0; @@ -123,7 +125,7 @@ static int newque (key_t key, int msgflg) INIT_LIST_HEAD(&msq->q_senders); msg_unlock(msq); - return msg_buildid(id,msq->q_perm.seq); + return msq->q_id; } static inline void ss_add(struct msg_queue* msq, struct msg_sender* mss) @@ -808,55 +810,25 @@ out_unlock: } #ifdef CONFIG_PROC_FS -static int sysvipc_msg_read_proc(char *buffer, char **start, off_t offset, int length, int *eof, void *data) +static int sysvipc_msg_proc_show(struct seq_file *s, void *it) { - off_t pos = 0; - off_t begin = 0; - int i, len = 0; - - down(&msg_ids.sem); - len += sprintf(buffer, " key msqid perms cbytes qnum lspid lrpid uid gid cuid cgid stime rtime ctime\n"); - - for(i = 0; i <= msg_ids.max_id; i++) { - struct msg_queue * msq; - msq = msg_lock(i); - if(msq != NULL) { - len += sprintf(buffer + len, "%10d %10d %4o %10lu %10lu %5u %5u %5u %5u %5u %5u %10lu %10lu %10lu\n", - msq->q_perm.key, - msg_buildid(i,msq->q_perm.seq), - msq->q_perm.mode, - msq->q_cbytes, - msq->q_qnum, - msq->q_lspid, - msq->q_lrpid, - msq->q_perm.uid, - msq->q_perm.gid, - msq->q_perm.cuid, - msq->q_perm.cgid, - msq->q_stime, - msq->q_rtime, - msq->q_ctime); - msg_unlock(msq); - - pos += len; - if(pos < offset) { - len = 0; - begin = pos; - } - if(pos > offset + length) - goto done; - } - - } - *eof = 1; -done: - up(&msg_ids.sem); - *start = buffer + (offset - begin); - len -= (offset - begin); - if(len > length) - len = length; - if(len < 0) - len = 0; - return len; + struct msg_queue *msq = it; + + return seq_printf(s, + "%10d %10d %4o %10lu %10lu %5u %5u %5u %5u %5u %5u %10lu %10lu %10lu\n", + msq->q_perm.key, + msq->q_id, + msq->q_perm.mode, + msq->q_cbytes, + msq->q_qnum, + msq->q_lspid, + msq->q_lrpid, + msq->q_perm.uid, + msq->q_perm.gid, + msq->q_perm.cuid, + msq->q_perm.cgid, + msq->q_stime, + msq->q_rtime, + msq->q_ctime); } #endif diff --git a/ipc/sem.c b/ipc/sem.c index 70975ce0784..19af028a3e3 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -73,6 +73,7 @@ #include <linux/security.h> #include <linux/syscalls.h> #include <linux/audit.h> +#include <linux/seq_file.h> #include <asm/uaccess.h> #include "util.h" @@ -89,7 +90,7 @@ static struct ipc_ids sem_ids; static int newary (key_t, int, int); static void freeary (struct sem_array *sma, int id); #ifdef CONFIG_PROC_FS -static int sysvipc_sem_read_proc(char *buffer, char **start, off_t offset, int length, int *eof, void *data); +static int sysvipc_sem_proc_show(struct seq_file *s, void *it); #endif #define SEMMSL_FAST 256 /* 512 bytes on stack */ @@ -116,10 +117,10 @@ void __init sem_init (void) { used_sems = 0; ipc_init_ids(&sem_ids,sc_semmni); - -#ifdef CONFIG_PROC_FS - create_proc_read_entry("sysvipc/sem", 0, NULL, sysvipc_sem_read_proc, NULL); -#endif + ipc_init_proc_interface("sysvipc/sem", + " key semid perms nsems uid gid cuid cgid otime ctime\n", + &sem_ids, + sysvipc_sem_proc_show); } /* @@ -193,6 +194,7 @@ static int newary (key_t key, int nsems, int semflg) } used_sems += nsems; + sma->sem_id = sem_buildid(id, sma->sem_perm.seq); sma->sem_base = (struct sem *) &sma[1]; /* sma->sem_pending = NULL; */ sma->sem_pending_last = &sma->sem_pending; @@ -201,7 +203,7 @@ static int newary (key_t key, int nsems, int semflg) sma->sem_ctime = get_seconds(); sem_unlock(sma); - return sem_buildid(id, sma->sem_perm.seq); + return sma->sem_id; } asmlinkage long sys_semget (key_t key, int nsems, int semflg) @@ -1328,50 +1330,21 @@ next_entry: } #ifdef CONFIG_PROC_FS -static int sysvipc_sem_read_proc(char *buffer, char **start, off_t offset, int length, int *eof, void *data) +static int sysvipc_sem_proc_show(struct seq_file *s, void *it) { - off_t pos = 0; - off_t begin = 0; - int i, len = 0; - - len += sprintf(buffer, " key semid perms nsems uid gid cuid cgid otime ctime\n"); - down(&sem_ids.sem); - - for(i = 0; i <= sem_ids.max_id; i++) { - struct sem_array *sma; - sma = sem_lock(i); - if(sma) { - len += sprintf(buffer + len, "%10d %10d %4o %10lu %5u %5u %5u %5u %10lu %10lu\n", - sma->sem_perm.key, - sem_buildid(i,sma->sem_perm.seq), - sma->sem_perm.mode, - sma->sem_nsems, - sma->sem_perm.uid, - sma->sem_perm.gid, - sma->sem_perm.cuid, - sma->sem_perm.cgid, - sma->sem_otime, - sma->sem_ctime); - sem_unlock(sma); - - pos += len; - if(pos < offset) { - len = 0; - begin = pos; - } - if(pos > offset + length) - goto done; - } - } - *eof = 1; -done: - up(&sem_ids.sem); - *start = buffer + (offset - begin); - len -= (offset - begin); - if(len > length) - len = length; - if(len < 0) - len = 0; - return len; + struct sem_array *sma = it; + + return seq_printf(s, + "%10d %10d %4o %10lu %5u %5u %5u %5u %10lu %10lu\n", + sma->sem_perm.key, + sma->sem_id, + sma->sem_perm.mode, + sma->sem_nsems, + sma->sem_perm.uid, + sma->sem_perm.gid, + sma->sem_perm.cuid, + sma->sem_perm.cgid, + sma->sem_otime, + sma->sem_ctime); } #endif diff --git a/ipc/shm.c b/ipc/shm.c index 1d6cf08d950..dca90489e3b 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -23,12 +23,12 @@ #include <linux/init.h> #include <linux/file.h> #include <linux/mman.h> -#include <linux/proc_fs.h> #include <linux/shmem_fs.h> #include <linux/security.h> #include <linux/syscalls.h> #include <linux/audit.h> #include <linux/ptrace.h> +#include <linux/seq_file.h> #include <asm/uaccess.h> @@ -51,7 +51,7 @@ static int newseg (key_t key, int shmflg, size_t size); static void shm_open (struct vm_area_struct *shmd); static void shm_close (struct vm_area_struct *shmd); #ifdef CONFIG_PROC_FS -static int sysvipc_shm_read_proc(char *buffer, char **start, off_t offset, int length, int *eof, void *data); +static int sysvipc_shm_proc_show(struct seq_file *s, void *it); #endif size_t shm_ctlmax = SHMMAX; @@ -63,9 +63,10 @@ static int shm_tot; /* total number of shared memory pages */ void __init shm_init (void) { ipc_init_ids(&shm_ids, 1); -#ifdef CONFIG_PROC_FS - create_proc_read_entry("sysvipc/shm", 0, NULL, sysvipc_shm_read_proc, NULL); -#endif + ipc_init_proc_interface("sysvipc/shm", + " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime\n", + &shm_ids, + sysvipc_shm_proc_show); } static inline int shm_checkid(struct shmid_kernel *s, int id) @@ -869,63 +870,32 @@ asmlinkage long sys_shmdt(char __user *shmaddr) } #ifdef CONFIG_PROC_FS -static int sysvipc_shm_read_proc(char *buffer, char **start, off_t offset, int length, int *eof, void *data) +static int sysvipc_shm_proc_show(struct seq_file *s, void *it) { - off_t pos = 0; - off_t begin = 0; - int i, len = 0; - - down(&shm_ids.sem); - len += sprintf(buffer, " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime\n"); + struct shmid_kernel *shp = it; + char *format; - for(i = 0; i <= shm_ids.max_id; i++) { - struct shmid_kernel* shp; - - shp = shm_lock(i); - if(shp!=NULL) { #define SMALL_STRING "%10d %10d %4o %10u %5u %5u %5d %5u %5u %5u %5u %10lu %10lu %10lu\n" #define BIG_STRING "%10d %10d %4o %21u %5u %5u %5d %5u %5u %5u %5u %10lu %10lu %10lu\n" - char *format; - if (sizeof(size_t) <= sizeof(int)) - format = SMALL_STRING; - else - format = BIG_STRING; - len += sprintf(buffer + len, format, - shp->shm_perm.key, - shm_buildid(i, shp->shm_perm.seq), - shp->shm_flags, - shp->shm_segsz, - shp->shm_cprid, - shp->shm_lprid, - is_file_hugepages(shp->shm_file) ? (file_count(shp->shm_file) - 1) : shp->shm_nattch, - shp->shm_perm.uid, - shp->shm_perm.gid, - shp->shm_perm.cuid, - shp->shm_perm.cgid, - shp->shm_atim, - shp->shm_dtim, - shp->shm_ctim); - shm_unlock(shp); - - pos += len; - if(pos < offset) { - len = 0; - begin = pos; - } - if(pos > offset + length) - goto done; - } - } - *eof = 1; -done: - up(&shm_ids.sem); - *start = buffer + (offset - begin); - len -= (offset - begin); - if(len > length) - len = length; - if(len < 0) - len = 0; - return len; + if (sizeof(size_t) <= sizeof(int)) + format = SMALL_STRING; + else + format = BIG_STRING; + return seq_printf(s, format, + shp->shm_perm.key, + shp->id, + shp->shm_flags, + shp->shm_segsz, + shp->shm_cprid, + shp->shm_lprid, + is_file_hugepages(shp->shm_file) ? (file_count(shp->shm_file) - 1) : shp->shm_nattch, + shp->shm_perm.uid, + shp->shm_perm.gid, + shp->shm_perm.cuid, + shp->shm_perm.cgid, + shp->shm_atim, + shp->shm_dtim, + shp->shm_ctim); } #endif diff --git a/ipc/util.c b/ipc/util.c index e00c35f7b2b..10e836d0d89 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -24,11 +24,20 @@ #include <linux/security.h> #include <linux/rcupdate.h> #include <linux/workqueue.h> +#include <linux/seq_file.h> +#include <linux/proc_fs.h> #include <asm/unistd.h> #include "util.h" +struct ipc_proc_iface { + const char *path; + const char *header; + struct ipc_ids *ids; + int (*show)(struct seq_file *, void *); +}; + /** * ipc_init - initialise IPC subsystem * @@ -86,6 +95,43 @@ void __init ipc_init_ids(struct ipc_ids* ids, int size) ids->entries->p[i] = NULL; } +#ifdef CONFIG_PROC_FS +static struct file_operations sysvipc_proc_fops; +/** + * ipc_init_proc_interface - Create a proc interface for sysipc types + * using a seq_file interface. + * @path: Path in procfs + * @header: Banner to be printed at the beginning of the file. + * @ids: ipc id table to iterate. + * @show: show routine. + */ +void __init ipc_init_proc_interface(const char *path, const char *header, + struct ipc_ids *ids, + int (*show)(struct seq_file *, void *)) +{ + struct proc_dir_entry *pde; + struct ipc_proc_iface *iface; + + iface = kmalloc(sizeof(*iface), GFP_KERNEL); + if (!iface) + return; + iface->path = path; + iface->header = header; + iface->ids = ids; + iface->show = show; + + pde = create_proc_entry(path, + S_IRUGO, /* world readable */ + NULL /* parent dir */); + if (pde) { + pde->data = iface; + pde->proc_fops = &sysvipc_proc_fops; + } else { + kfree(iface); + } +} +#endif + /** * ipc_findkey - find a key in an ipc identifier set * @ids: Identifier set @@ -578,3 +624,113 @@ int ipc_parse_version (int *cmd) } #endif /* __ARCH_WANT_IPC_PARSE_VERSION */ + +#ifdef CONFIG_PROC_FS +static void *sysvipc_proc_next(struct seq_file *s, void *it, loff_t *pos) +{ + struct ipc_proc_iface *iface = s->private; + struct kern_ipc_perm *ipc = it; + loff_t p; + + /* If we had an ipc id locked before, unlock it */ + if (ipc && ipc != SEQ_START_TOKEN) + ipc_unlock(ipc); + + /* + * p = *pos - 1 (because id 0 starts at position 1) + * + 1 (because we increment the position by one) + */ + for (p = *pos; p <= iface->ids->max_id; p++) { + if ((ipc = ipc_lock(iface->ids, p)) != NULL) { + *pos = p + 1; + return ipc; + } + } + + /* Out of range - return NULL to terminate iteration */ + return NULL; +} + +/* + * File positions: pos 0 -> header, pos n -> ipc id + 1. + * SeqFile iterator: iterator value locked shp or SEQ_TOKEN_START. + */ +static void *sysvipc_proc_start(struct seq_file *s, loff_t *pos) +{ + struct ipc_proc_iface *iface = s->private; + struct kern_ipc_perm *ipc; + loff_t p; + + /* + * Take the lock - this will be released by the corresponding + * call to stop(). + */ + down(&iface->ids->sem); + + /* pos < 0 is invalid */ + if (*pos < 0) + return NULL; + + /* pos == 0 means header */ + if (*pos == 0) + return SEQ_START_TOKEN; + + /* Find the (pos-1)th ipc */ + for (p = *pos - 1; p <= iface->ids->max_id; p++) { + if ((ipc = ipc_lock(iface->ids, p)) != NULL) { + *pos = p + 1; + return ipc; + } + } + return NULL; +} + +static void sysvipc_proc_stop(struct seq_file *s, void *it) +{ + struct kern_ipc_perm *ipc = it; + struct ipc_proc_iface *iface = s->private; + + /* If we had a locked segment, release it */ + if (ipc && ipc != SEQ_START_TOKEN) + ipc_unlock(ipc); + + /* Release the lock we took in start() */ + up(&iface->ids->sem); +} + +static int sysvipc_proc_show(struct seq_file *s, void *it) +{ + struct ipc_proc_iface *iface = s->private; + + if (it == SEQ_START_TOKEN) + return seq_puts(s, iface->header); + + return iface->show(s, it); +} + +static struct seq_operations sysvipc_proc_seqops = { + .start = sysvipc_proc_start, + .stop = sysvipc_proc_stop, + .next = sysvipc_proc_next, + .show = sysvipc_proc_show, +}; + +static int sysvipc_proc_open(struct inode *inode, struct file *file) { + int ret; + struct seq_file *seq; + + ret = seq_open(file, &sysvipc_proc_seqops); + if (!ret) { + seq = file->private_data; + seq->private = PDE(inode)->data; + } + return ret; +} + +static struct file_operations sysvipc_proc_fops = { + .open = sysvipc_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; +#endif /* CONFIG_PROC_FS */ diff --git a/ipc/util.h b/ipc/util.h index 44348ca5a70..fc9a28be079 100644 --- a/ipc/util.h +++ b/ipc/util.h @@ -30,7 +30,15 @@ struct ipc_ids { struct ipc_id_ary* entries; }; +struct seq_file; void __init ipc_init_ids(struct ipc_ids* ids, int size); +#ifdef CONFIG_PROC_FS +void __init ipc_init_proc_interface(const char *path, const char *header, + struct ipc_ids *ids, + int (*show)(struct seq_file *, void *)); +#else +#define ipc_init_proc_interface(path, header, ids, show) do {} while (0) +#endif /* must be called with ids->sem acquired.*/ int ipc_findkey(struct ipc_ids* ids, key_t key); |