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author | Al Viro <viro@zeniv.linux.org.uk> | 2014-11-19 19:02:53 +0100 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-11-19 19:02:53 +0100 |
commit | 8ce74dd6057832618957fc2cbd38fa959c3a0a6c (patch) | |
tree | af3bede951087ebc58988ad073182a85bf899e27 /fs | |
parent | kill f_dentry macro (diff) | |
parent | debugfs: Have debugfs_print_regs32() return void (diff) | |
download | linux-8ce74dd6057832618957fc2cbd38fa959c3a0a6c.tar.xz linux-8ce74dd6057832618957fc2cbd38fa959c3a0a6c.zip |
Merge tag 'trace-seq-file-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into for-next
Pull the beginning of seq_file cleanup from Steven:
"I'm looking to clean up the seq_file code and to eventually merge the
trace_seq code with seq_file as well, since they basically do the same thing.
Part of this process is to remove the return code of seq_printf() and friends
as they are rather inconsistent. It is better to use the new function
seq_has_overflowed() if you want to stop processing when the buffer
is full. Note, if the buffer is full, the seq_file code will throw away
the contents, allocate a bigger buffer, and then call your code again
to fill in the data. The only thing that breaking out of the function
early does is to save a little time which is probably never noticed.
I started with patches from Joe Perches and modified them as well.
There's many more places that need to be updated before we can convert
seq_printf() and friends to return void. But this patch set introduces
the seq_has_overflowed() and does some initial updates."
Diffstat (limited to 'fs')
-rw-r--r-- | fs/debugfs/file.c | 15 | ||||
-rw-r--r-- | fs/dlm/debug_fs.c | 263 | ||||
-rw-r--r-- | fs/eventfd.c | 9 | ||||
-rw-r--r-- | fs/eventpoll.c | 13 | ||||
-rw-r--r-- | fs/notify/fdinfo.c | 78 | ||||
-rw-r--r-- | fs/notify/fdinfo.h | 4 | ||||
-rw-r--r-- | fs/proc/fd.c | 3 | ||||
-rw-r--r-- | fs/seq_file.c | 15 | ||||
-rw-r--r-- | fs/signalfd.c | 4 | ||||
-rw-r--r-- | fs/timerfd.c | 27 |
10 files changed, 191 insertions, 240 deletions
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c index 76c08c2beb2f..8e0f2f410189 100644 --- a/fs/debugfs/file.c +++ b/fs/debugfs/file.c @@ -692,18 +692,19 @@ EXPORT_SYMBOL_GPL(debugfs_create_u32_array); * because some peripherals have several blocks of identical registers, * for example configuration of dma channels */ -int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs, - int nregs, void __iomem *base, char *prefix) +void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs, + int nregs, void __iomem *base, char *prefix) { - int i, ret = 0; + int i; for (i = 0; i < nregs; i++, regs++) { if (prefix) - ret += seq_printf(s, "%s", prefix); - ret += seq_printf(s, "%s = 0x%08x\n", regs->name, - readl(base + regs->offset)); + seq_printf(s, "%s", prefix); + seq_printf(s, "%s = 0x%08x\n", regs->name, + readl(base + regs->offset)); + if (seq_has_overflowed(s)) + break; } - return ret; } EXPORT_SYMBOL_GPL(debugfs_print_regs32); diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c index 1323c568e362..eea64912c9c0 100644 --- a/fs/dlm/debug_fs.c +++ b/fs/dlm/debug_fs.c @@ -48,8 +48,8 @@ static char *print_lockmode(int mode) } } -static int print_format1_lock(struct seq_file *s, struct dlm_lkb *lkb, - struct dlm_rsb *res) +static void print_format1_lock(struct seq_file *s, struct dlm_lkb *lkb, + struct dlm_rsb *res) { seq_printf(s, "%08x %s", lkb->lkb_id, print_lockmode(lkb->lkb_grmode)); @@ -68,21 +68,17 @@ static int print_format1_lock(struct seq_file *s, struct dlm_lkb *lkb, if (lkb->lkb_wait_type) seq_printf(s, " wait_type: %d", lkb->lkb_wait_type); - return seq_puts(s, "\n"); + seq_puts(s, "\n"); } -static int print_format1(struct dlm_rsb *res, struct seq_file *s) +static void print_format1(struct dlm_rsb *res, struct seq_file *s) { struct dlm_lkb *lkb; int i, lvblen = res->res_ls->ls_lvblen, recover_list, root_list; - int rv; lock_rsb(res); - rv = seq_printf(s, "\nResource %p Name (len=%d) \"", - res, res->res_length); - if (rv) - goto out; + seq_printf(s, "\nResource %p Name (len=%d) \"", res, res->res_length); for (i = 0; i < res->res_length; i++) { if (isprint(res->res_name[i])) @@ -92,17 +88,16 @@ static int print_format1(struct dlm_rsb *res, struct seq_file *s) } if (res->res_nodeid > 0) - rv = seq_printf(s, "\"\nLocal Copy, Master is node %d\n", - res->res_nodeid); + seq_printf(s, "\"\nLocal Copy, Master is node %d\n", + res->res_nodeid); else if (res->res_nodeid == 0) - rv = seq_puts(s, "\"\nMaster Copy\n"); + seq_puts(s, "\"\nMaster Copy\n"); else if (res->res_nodeid == -1) - rv = seq_printf(s, "\"\nLooking up master (lkid %x)\n", - res->res_first_lkid); + seq_printf(s, "\"\nLooking up master (lkid %x)\n", + res->res_first_lkid); else - rv = seq_printf(s, "\"\nInvalid master %d\n", - res->res_nodeid); - if (rv) + seq_printf(s, "\"\nInvalid master %d\n", res->res_nodeid); + if (seq_has_overflowed(s)) goto out; /* Print the LVB: */ @@ -116,8 +111,8 @@ static int print_format1(struct dlm_rsb *res, struct seq_file *s) } if (rsb_flag(res, RSB_VALNOTVALID)) seq_puts(s, " (INVALID)"); - rv = seq_puts(s, "\n"); - if (rv) + seq_puts(s, "\n"); + if (seq_has_overflowed(s)) goto out; } @@ -125,32 +120,30 @@ static int print_format1(struct dlm_rsb *res, struct seq_file *s) recover_list = !list_empty(&res->res_recover_list); if (root_list || recover_list) { - rv = seq_printf(s, "Recovery: root %d recover %d flags %lx " - "count %d\n", root_list, recover_list, - res->res_flags, res->res_recover_locks_count); - if (rv) - goto out; + seq_printf(s, "Recovery: root %d recover %d flags %lx count %d\n", + root_list, recover_list, + res->res_flags, res->res_recover_locks_count); } /* Print the locks attached to this resource */ seq_puts(s, "Granted Queue\n"); list_for_each_entry(lkb, &res->res_grantqueue, lkb_statequeue) { - rv = print_format1_lock(s, lkb, res); - if (rv) + print_format1_lock(s, lkb, res); + if (seq_has_overflowed(s)) goto out; } seq_puts(s, "Conversion Queue\n"); list_for_each_entry(lkb, &res->res_convertqueue, lkb_statequeue) { - rv = print_format1_lock(s, lkb, res); - if (rv) + print_format1_lock(s, lkb, res); + if (seq_has_overflowed(s)) goto out; } seq_puts(s, "Waiting Queue\n"); list_for_each_entry(lkb, &res->res_waitqueue, lkb_statequeue) { - rv = print_format1_lock(s, lkb, res); - if (rv) + print_format1_lock(s, lkb, res); + if (seq_has_overflowed(s)) goto out; } @@ -159,23 +152,23 @@ static int print_format1(struct dlm_rsb *res, struct seq_file *s) seq_puts(s, "Lookup Queue\n"); list_for_each_entry(lkb, &res->res_lookup, lkb_rsb_lookup) { - rv = seq_printf(s, "%08x %s", lkb->lkb_id, - print_lockmode(lkb->lkb_rqmode)); + seq_printf(s, "%08x %s", + lkb->lkb_id, print_lockmode(lkb->lkb_rqmode)); if (lkb->lkb_wait_type) seq_printf(s, " wait_type: %d", lkb->lkb_wait_type); - rv = seq_puts(s, "\n"); + seq_puts(s, "\n"); + if (seq_has_overflowed(s)) + goto out; } out: unlock_rsb(res); - return rv; } -static int print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb, - struct dlm_rsb *r) +static void print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb, + struct dlm_rsb *r) { u64 xid = 0; u64 us; - int rv; if (lkb->lkb_flags & DLM_IFL_USER) { if (lkb->lkb_ua) @@ -188,103 +181,97 @@ static int print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb, /* id nodeid remid pid xid exflags flags sts grmode rqmode time_us r_nodeid r_len r_name */ - rv = seq_printf(s, "%x %d %x %u %llu %x %x %d %d %d %llu %u %d \"%s\"\n", - lkb->lkb_id, - lkb->lkb_nodeid, - lkb->lkb_remid, - lkb->lkb_ownpid, - (unsigned long long)xid, - lkb->lkb_exflags, - lkb->lkb_flags, - lkb->lkb_status, - lkb->lkb_grmode, - lkb->lkb_rqmode, - (unsigned long long)us, - r->res_nodeid, - r->res_length, - r->res_name); - return rv; + seq_printf(s, "%x %d %x %u %llu %x %x %d %d %d %llu %u %d \"%s\"\n", + lkb->lkb_id, + lkb->lkb_nodeid, + lkb->lkb_remid, + lkb->lkb_ownpid, + (unsigned long long)xid, + lkb->lkb_exflags, + lkb->lkb_flags, + lkb->lkb_status, + lkb->lkb_grmode, + lkb->lkb_rqmode, + (unsigned long long)us, + r->res_nodeid, + r->res_length, + r->res_name); } -static int print_format2(struct dlm_rsb *r, struct seq_file *s) +static void print_format2(struct dlm_rsb *r, struct seq_file *s) { struct dlm_lkb *lkb; - int rv = 0; lock_rsb(r); list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) { - rv = print_format2_lock(s, lkb, r); - if (rv) + print_format2_lock(s, lkb, r); + if (seq_has_overflowed(s)) goto out; } list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue) { - rv = print_format2_lock(s, lkb, r); - if (rv) + print_format2_lock(s, lkb, r); + if (seq_has_overflowed(s)) goto out; } list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue) { - rv = print_format2_lock(s, lkb, r); - if (rv) + print_format2_lock(s, lkb, r); + if (seq_has_overflowed(s)) goto out; } out: unlock_rsb(r); - return rv; } -static int print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb, +static void print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb, int rsb_lookup) { u64 xid = 0; - int rv; if (lkb->lkb_flags & DLM_IFL_USER) { if (lkb->lkb_ua) xid = lkb->lkb_ua->xid; } - rv = seq_printf(s, "lkb %x %d %x %u %llu %x %x %d %d %d %d %d %d %u %llu %llu\n", - lkb->lkb_id, - lkb->lkb_nodeid, - lkb->lkb_remid, - lkb->lkb_ownpid, - (unsigned long long)xid, - lkb->lkb_exflags, - lkb->lkb_flags, - lkb->lkb_status, - lkb->lkb_grmode, - lkb->lkb_rqmode, - lkb->lkb_last_bast.mode, - rsb_lookup, - lkb->lkb_wait_type, - lkb->lkb_lvbseq, - (unsigned long long)ktime_to_ns(lkb->lkb_timestamp), - (unsigned long long)ktime_to_ns(lkb->lkb_last_bast_time)); - return rv; + seq_printf(s, "lkb %x %d %x %u %llu %x %x %d %d %d %d %d %d %u %llu %llu\n", + lkb->lkb_id, + lkb->lkb_nodeid, + lkb->lkb_remid, + lkb->lkb_ownpid, + (unsigned long long)xid, + lkb->lkb_exflags, + lkb->lkb_flags, + lkb->lkb_status, + lkb->lkb_grmode, + lkb->lkb_rqmode, + lkb->lkb_last_bast.mode, + rsb_lookup, + lkb->lkb_wait_type, + lkb->lkb_lvbseq, + (unsigned long long)ktime_to_ns(lkb->lkb_timestamp), + (unsigned long long)ktime_to_ns(lkb->lkb_last_bast_time)); } -static int print_format3(struct dlm_rsb *r, struct seq_file *s) +static void print_format3(struct dlm_rsb *r, struct seq_file *s) { struct dlm_lkb *lkb; int i, lvblen = r->res_ls->ls_lvblen; int print_name = 1; - int rv; lock_rsb(r); - rv = seq_printf(s, "rsb %p %d %x %lx %d %d %u %d ", - r, - r->res_nodeid, - r->res_first_lkid, - r->res_flags, - !list_empty(&r->res_root_list), - !list_empty(&r->res_recover_list), - r->res_recover_locks_count, - r->res_length); - if (rv) + seq_printf(s, "rsb %p %d %x %lx %d %d %u %d ", + r, + r->res_nodeid, + r->res_first_lkid, + r->res_flags, + !list_empty(&r->res_root_list), + !list_empty(&r->res_recover_list), + r->res_recover_locks_count, + r->res_length); + if (seq_has_overflowed(s)) goto out; for (i = 0; i < r->res_length; i++) { @@ -292,7 +279,7 @@ static int print_format3(struct dlm_rsb *r, struct seq_file *s) print_name = 0; } - seq_printf(s, "%s", print_name ? "str " : "hex"); + seq_puts(s, print_name ? "str " : "hex"); for (i = 0; i < r->res_length; i++) { if (print_name) @@ -300,8 +287,8 @@ static int print_format3(struct dlm_rsb *r, struct seq_file *s) else seq_printf(s, " %02x", (unsigned char)r->res_name[i]); } - rv = seq_puts(s, "\n"); - if (rv) + seq_puts(s, "\n"); + if (seq_has_overflowed(s)) goto out; if (!r->res_lvbptr) @@ -311,65 +298,62 @@ static int print_format3(struct dlm_rsb *r, struct seq_file *s) for (i = 0; i < lvblen; i++) seq_printf(s, " %02x", (unsigned char)r->res_lvbptr[i]); - rv = seq_puts(s, "\n"); - if (rv) + seq_puts(s, "\n"); + if (seq_has_overflowed(s)) goto out; do_locks: list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) { - rv = print_format3_lock(s, lkb, 0); - if (rv) + print_format3_lock(s, lkb, 0); + if (seq_has_overflowed(s)) goto out; } list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue) { - rv = print_format3_lock(s, lkb, 0); - if (rv) + print_format3_lock(s, lkb, 0); + if (seq_has_overflowed(s)) goto out; } list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue) { - rv = print_format3_lock(s, lkb, 0); - if (rv) + print_format3_lock(s, lkb, 0); + if (seq_has_overflowed(s)) goto out; } list_for_each_entry(lkb, &r->res_lookup, lkb_rsb_lookup) { - rv = print_format3_lock(s, lkb, 1); - if (rv) + print_format3_lock(s, lkb, 1); + if (seq_has_overflowed(s)) goto out; } out: unlock_rsb(r); - return rv; } -static int print_format4(struct dlm_rsb *r, struct seq_file *s) +static void print_format4(struct dlm_rsb *r, struct seq_file *s) { int our_nodeid = dlm_our_nodeid(); int print_name = 1; - int i, rv; + int i; lock_rsb(r); - rv = seq_printf(s, "rsb %p %d %d %d %d %lu %lx %d ", - r, - r->res_nodeid, - r->res_master_nodeid, - r->res_dir_nodeid, - our_nodeid, - r->res_toss_time, - r->res_flags, - r->res_length); - if (rv) - goto out; + seq_printf(s, "rsb %p %d %d %d %d %lu %lx %d ", + r, + r->res_nodeid, + r->res_master_nodeid, + r->res_dir_nodeid, + our_nodeid, + r->res_toss_time, + r->res_flags, + r->res_length); for (i = 0; i < r->res_length; i++) { if (!isascii(r->res_name[i]) || !isprint(r->res_name[i])) print_name = 0; } - seq_printf(s, "%s", print_name ? "str " : "hex"); + seq_puts(s, print_name ? "str " : "hex"); for (i = 0; i < r->res_length; i++) { if (print_name) @@ -377,10 +361,9 @@ static int print_format4(struct dlm_rsb *r, struct seq_file *s) else seq_printf(s, " %02x", (unsigned char)r->res_name[i]); } - rv = seq_puts(s, "\n"); - out: + seq_puts(s, "\n"); + unlock_rsb(r); - return rv; } struct rsbtbl_iter { @@ -390,47 +373,45 @@ struct rsbtbl_iter { int header; }; -/* seq_printf returns -1 if the buffer is full, and 0 otherwise. - If the buffer is full, seq_printf can be called again, but it - does nothing and just returns -1. So, the these printing routines - periodically check the return value to avoid wasting too much time - trying to print to a full buffer. */ +/* + * If the buffer is full, seq_printf can be called again, but it + * does nothing. So, the these printing routines periodically check + * seq_has_overflowed to avoid wasting too much time trying to print to + * a full buffer. + */ static int table_seq_show(struct seq_file *seq, void *iter_ptr) { struct rsbtbl_iter *ri = iter_ptr; - int rv = 0; switch (ri->format) { case 1: - rv = print_format1(ri->rsb, seq); + print_format1(ri->rsb, seq); break; case 2: if (ri->header) { - seq_printf(seq, "id nodeid remid pid xid exflags " - "flags sts grmode rqmode time_ms " - "r_nodeid r_len r_name\n"); + seq_puts(seq, "id nodeid remid pid xid exflags flags sts grmode rqmode time_ms r_nodeid r_len r_name\n"); ri->header = 0; } - rv = print_format2(ri->rsb, seq); + print_format2(ri->rsb, seq); break; case 3: if (ri->header) { - seq_printf(seq, "version rsb 1.1 lvb 1.1 lkb 1.1\n"); + seq_puts(seq, "version rsb 1.1 lvb 1.1 lkb 1.1\n"); ri->header = 0; } - rv = print_format3(ri->rsb, seq); + print_format3(ri->rsb, seq); break; case 4: if (ri->header) { - seq_printf(seq, "version 4 rsb 2\n"); + seq_puts(seq, "version 4 rsb 2\n"); ri->header = 0; } - rv = print_format4(ri->rsb, seq); + print_format4(ri->rsb, seq); break; } - return rv; + return 0; } static const struct seq_operations format1_seq_ops; diff --git a/fs/eventfd.c b/fs/eventfd.c index d6a88e7812f3..4b0a226024fa 100644 --- a/fs/eventfd.c +++ b/fs/eventfd.c @@ -287,17 +287,14 @@ static ssize_t eventfd_write(struct file *file, const char __user *buf, size_t c } #ifdef CONFIG_PROC_FS -static int eventfd_show_fdinfo(struct seq_file *m, struct file *f) +static void eventfd_show_fdinfo(struct seq_file *m, struct file *f) { struct eventfd_ctx *ctx = f->private_data; - int ret; spin_lock_irq(&ctx->wqh.lock); - ret = seq_printf(m, "eventfd-count: %16llx\n", - (unsigned long long)ctx->count); + seq_printf(m, "eventfd-count: %16llx\n", + (unsigned long long)ctx->count); spin_unlock_irq(&ctx->wqh.lock); - - return ret; } #endif diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 7bcfff900f05..d77f94491352 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -870,25 +870,22 @@ static unsigned int ep_eventpoll_poll(struct file *file, poll_table *wait) } #ifdef CONFIG_PROC_FS -static int ep_show_fdinfo(struct seq_file *m, struct file *f) +static void ep_show_fdinfo(struct seq_file *m, struct file *f) { struct eventpoll *ep = f->private_data; struct rb_node *rbp; - int ret = 0; mutex_lock(&ep->mtx); for (rbp = rb_first(&ep->rbr); rbp; rbp = rb_next(rbp)) { struct epitem *epi = rb_entry(rbp, struct epitem, rbn); - ret = seq_printf(m, "tfd: %8d events: %8x data: %16llx\n", - epi->ffd.fd, epi->event.events, - (long long)epi->event.data); - if (ret) + seq_printf(m, "tfd: %8d events: %8x data: %16llx\n", + epi->ffd.fd, epi->event.events, + (long long)epi->event.data); + if (seq_has_overflowed(m)) break; } mutex_unlock(&ep->mtx); - - return ret; } #endif diff --git a/fs/notify/fdinfo.c b/fs/notify/fdinfo.c index 9d7e2b9659cb..6ffd220eb14d 100644 --- a/fs/notify/fdinfo.c +++ b/fs/notify/fdinfo.c @@ -20,25 +20,24 @@ #if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY) -static int show_fdinfo(struct seq_file *m, struct file *f, - int (*show)(struct seq_file *m, struct fsnotify_mark *mark)) +static void show_fdinfo(struct seq_file *m, struct file *f, + void (*show)(struct seq_file *m, + struct fsnotify_mark *mark)) { struct fsnotify_group *group = f->private_data; struct fsnotify_mark *mark; - int ret = 0; mutex_lock(&group->mark_mutex); list_for_each_entry(mark, &group->marks_list, g_list) { - ret = show(m, mark); - if (ret) + show(m, mark); + if (seq_has_overflowed(m)) break; } mutex_unlock(&group->mark_mutex); - return ret; } #if defined(CONFIG_EXPORTFS) -static int show_mark_fhandle(struct seq_file *m, struct inode *inode) +static void show_mark_fhandle(struct seq_file *m, struct inode *inode) { struct { struct file_handle handle; @@ -52,71 +51,62 @@ static int show_mark_fhandle(struct seq_file *m, struct inode *inode) ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, 0); if ((ret == FILEID_INVALID) || (ret < 0)) { WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret); - return 0; + return; } f.handle.handle_type = ret; f.handle.handle_bytes = size * sizeof(u32); - ret = seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:", - f.handle.handle_bytes, f.handle.handle_type); + seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:", + f.handle.handle_bytes, f.handle.handle_type); for (i = 0; i < f.handle.handle_bytes; i++) - ret |= seq_printf(m, "%02x", (int)f.handle.f_handle[i]); - - return ret; + seq_printf(m, "%02x", (int)f.handle.f_handle[i]); } #else -static int show_mark_fhandle(struct seq_file *m, struct inode *inode) +static void show_mark_fhandle(struct seq_file *m, struct inode *inode) { - return 0; } #endif #ifdef CONFIG_INOTIFY_USER -static int inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) +static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) { struct inotify_inode_mark *inode_mark; struct inode *inode; - int ret = 0; if (!(mark->flags & (FSNOTIFY_MARK_FLAG_ALIVE | FSNOTIFY_MARK_FLAG_INODE))) - return 0; + return; inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark); inode = igrab(mark->i.inode); if (inode) { - ret = seq_printf(m, "inotify wd:%x ino:%lx sdev:%x " - "mask:%x ignored_mask:%x ", - inode_mark->wd, inode->i_ino, - inode->i_sb->s_dev, - mark->mask, mark->ignored_mask); - ret |= show_mark_fhandle(m, inode); - ret |= seq_putc(m, '\n'); + seq_printf(m, "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:%x ", + inode_mark->wd, inode->i_ino, inode->i_sb->s_dev, + mark->mask, mark->ignored_mask); + show_mark_fhandle(m, inode); + seq_putc(m, '\n'); iput(inode); } - - return ret; } -int inotify_show_fdinfo(struct seq_file *m, struct file *f) +void inotify_show_fdinfo(struct seq_file *m, struct file *f) { - return show_fdinfo(m, f, inotify_fdinfo); + show_fdinfo(m, f, inotify_fdinfo); } #endif /* CONFIG_INOTIFY_USER */ #ifdef CONFIG_FANOTIFY -static int fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) +static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) { unsigned int mflags = 0; struct inode *inode; - int ret = 0; if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE)) - return 0; + return; if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY) mflags |= FAN_MARK_IGNORED_SURV_MODIFY; @@ -124,26 +114,22 @@ static int fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) { inode = igrab(mark->i.inode); if (!inode) - goto out; - ret = seq_printf(m, "fanotify ino:%lx sdev:%x " - "mflags:%x mask:%x ignored_mask:%x ", - inode->i_ino, inode->i_sb->s_dev, - mflags, mark->mask, mark->ignored_mask); - ret |= show_mark_fhandle(m, inode); - ret |= seq_putc(m, '\n'); + return; + seq_printf(m, "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x ", + inode->i_ino, inode->i_sb->s_dev, + mflags, mark->mask, mark->ignored_mask); + show_mark_fhandle(m, inode); + seq_putc(m, '\n'); iput(inode); } else if (mark->flags & FSNOTIFY_MARK_FLAG_VFSMOUNT) { struct mount *mnt = real_mount(mark->m.mnt); - ret = seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x " - "ignored_mask:%x\n", mnt->mnt_id, mflags, - mark->mask, mark->ignored_mask); + seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n", + mnt->mnt_id, mflags, mark->mask, mark->ignored_mask); } -out: - return ret; } -int fanotify_show_fdinfo(struct seq_file *m, struct file *f) +void fanotify_show_fdinfo(struct seq_file *m, struct file *f) { struct fsnotify_group *group = f->private_data; unsigned int flags = 0; @@ -169,7 +155,7 @@ int fanotify_show_fdinfo(struct seq_file *m, struct file *f) seq_printf(m, "fanotify flags:%x event-flags:%x\n", flags, group->fanotify_data.f_flags); - return show_fdinfo(m, f, fanotify_fdinfo); + show_fdinfo(m, f, fanotify_fdinfo); } #endif /* CONFIG_FANOTIFY */ diff --git a/fs/notify/fdinfo.h b/fs/notify/fdinfo.h index 556afda990e9..9664c4904d6b 100644 --- a/fs/notify/fdinfo.h +++ b/fs/notify/fdinfo.h @@ -10,11 +10,11 @@ struct file; #ifdef CONFIG_PROC_FS #ifdef CONFIG_INOTIFY_USER -extern int inotify_show_fdinfo(struct seq_file *m, struct file *f); +void inotify_show_fdinfo(struct seq_file *m, struct file *f); #endif #ifdef CONFIG_FANOTIFY -extern int fanotify_show_fdinfo(struct seq_file *m, struct file *f); +void fanotify_show_fdinfo(struct seq_file *m, struct file *f); #endif #else /* CONFIG_PROC_FS */ diff --git a/fs/proc/fd.c b/fs/proc/fd.c index e11d7c590bb0..8e5ad83b629a 100644 --- a/fs/proc/fd.c +++ b/fs/proc/fd.c @@ -53,7 +53,8 @@ static int seq_show(struct seq_file *m, void *v) (long long)file->f_pos, f_flags, real_mount(file->f_path.mnt)->mnt_id); if (file->f_op->show_fdinfo) - ret = file->f_op->show_fdinfo(m, file); + file->f_op->show_fdinfo(m, file); + ret = seq_has_overflowed(m); fput(file); } diff --git a/fs/seq_file.c b/fs/seq_file.c index 3857b720cb1b..353948ba1c5b 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -16,17 +16,6 @@ #include <asm/uaccess.h> #include <asm/page.h> - -/* - * seq_files have a buffer which can may overflow. When this happens a larger - * buffer is reallocated and all the data will be printed again. - * The overflow state is true when m->count == m->size. - */ -static bool seq_overflow(struct seq_file *m) -{ - return m->count == m->size; -} - static void seq_set_overflow(struct seq_file *m) { m->count = m->size; @@ -124,7 +113,7 @@ static int traverse(struct seq_file *m, loff_t offset) error = 0; m->count = 0; } - if (seq_overflow(m)) + if (seq_has_overflowed(m)) goto Eoverflow; if (pos + m->count > offset) { m->from = offset - pos; @@ -267,7 +256,7 @@ Fill: break; } err = m->op->show(m, p); - if (seq_overflow(m) || err) { + if (seq_has_overflowed(m) || err) { m->count = offs; if (likely(err <= 0)) break; diff --git a/fs/signalfd.c b/fs/signalfd.c index 424b7b65321f..7e412ad74836 100644 --- a/fs/signalfd.c +++ b/fs/signalfd.c @@ -230,7 +230,7 @@ static ssize_t signalfd_read(struct file *file, char __user *buf, size_t count, } #ifdef CONFIG_PROC_FS -static int signalfd_show_fdinfo(struct seq_file *m, struct file *f) +static void signalfd_show_fdinfo(struct seq_file *m, struct file *f) { struct signalfd_ctx *ctx = f->private_data; sigset_t sigmask; @@ -238,8 +238,6 @@ static int signalfd_show_fdinfo(struct seq_file *m, struct file *f) sigmask = ctx->sigmask; signotset(&sigmask); render_sigset_t(m, "sigmask:\t", &sigmask); - - return 0; } #endif diff --git a/fs/timerfd.c b/fs/timerfd.c index b46ffa94372a..b94fa6c3c6eb 100644 --- a/fs/timerfd.c +++ b/fs/timerfd.c @@ -288,7 +288,7 @@ static ssize_t timerfd_read(struct file *file, char __user *buf, size_t count, } #ifdef CONFIG_PROC_FS -static int timerfd_show(struct seq_file *m, struct file *file) +static void timerfd_show(struct seq_file *m, struct file *file) { struct timerfd_ctx *ctx = file->private_data; struct itimerspec t; @@ -298,18 +298,19 @@ static int timerfd_show(struct seq_file *m, struct file *file) t.it_interval = ktime_to_timespec(ctx->tintv); spin_unlock_irq(&ctx->wqh.lock); - return seq_printf(m, - "clockid: %d\n" - "ticks: %llu\n" - "settime flags: 0%o\n" - "it_value: (%llu, %llu)\n" - "it_interval: (%llu, %llu)\n", - ctx->clockid, (unsigned long long)ctx->ticks, - ctx->settime_flags, - (unsigned long long)t.it_value.tv_sec, - (unsigned long long)t.it_value.tv_nsec, - (unsigned long long)t.it_interval.tv_sec, - (unsigned long long)t.it_interval.tv_nsec); + seq_printf(m, + "clockid: %d\n" + "ticks: %llu\n" + "settime flags: 0%o\n" + "it_value: (%llu, %llu)\n" + "it_interval: (%llu, %llu)\n", + ctx->clockid, + (unsigned long long)ctx->ticks, + ctx->settime_flags, + (unsigned long long)t.it_value.tv_sec, + (unsigned long long)t.it_value.tv_nsec, + (unsigned long long)t.it_interval.tv_sec, + (unsigned long long)t.it_interval.tv_nsec); } #else #define timerfd_show NULL |