diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/bio.c | 124 | ||||
| -rw-r--r-- | fs/compat.c | 11 | ||||
| -rw-r--r-- | fs/exec.c | 25 | ||||
| -rw-r--r-- | fs/gfs2/rgrp.c | 13 | ||||
| -rw-r--r-- | fs/proc/stat.c | 5 |
5 files changed, 89 insertions, 89 deletions
@@ -175,14 +175,6 @@ struct bio_vec *bvec_alloc_bs(gfp_t gfp_mask, int nr, unsigned long *idx, struct bio_vec *bvl; /* - * If 'bs' is given, lookup the pool and do the mempool alloc. - * If not, this is a bio_kmalloc() allocation and just do a - * kzalloc() for the exact number of vecs right away. - */ - if (!bs) - bvl = kmalloc(nr * sizeof(struct bio_vec), gfp_mask); - - /* * see comment near bvec_array define! */ switch (nr) { @@ -260,21 +252,6 @@ void bio_free(struct bio *bio, struct bio_set *bs) mempool_free(p, bs->bio_pool); } -/* - * default destructor for a bio allocated with bio_alloc_bioset() - */ -static void bio_fs_destructor(struct bio *bio) -{ - bio_free(bio, fs_bio_set); -} - -static void bio_kmalloc_destructor(struct bio *bio) -{ - if (bio_has_allocated_vec(bio)) - kfree(bio->bi_io_vec); - kfree(bio); -} - void bio_init(struct bio *bio) { memset(bio, 0, sizeof(*bio)); @@ -301,21 +278,15 @@ void bio_init(struct bio *bio) **/ struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs) { + unsigned long idx = BIO_POOL_NONE; struct bio_vec *bvl = NULL; - struct bio *bio = NULL; - unsigned long idx = 0; - void *p = NULL; - - if (bs) { - p = mempool_alloc(bs->bio_pool, gfp_mask); - if (!p) - goto err; - bio = p + bs->front_pad; - } else { - bio = kmalloc(sizeof(*bio), gfp_mask); - if (!bio) - goto err; - } + struct bio *bio; + void *p; + + p = mempool_alloc(bs->bio_pool, gfp_mask); + if (unlikely(!p)) + return NULL; + bio = p + bs->front_pad; bio_init(bio); @@ -332,22 +303,50 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs) nr_iovecs = bvec_nr_vecs(idx); } +out_set: bio->bi_flags |= idx << BIO_POOL_OFFSET; bio->bi_max_vecs = nr_iovecs; -out_set: bio->bi_io_vec = bvl; - return bio; err_free: - if (bs) - mempool_free(p, bs->bio_pool); - else - kfree(bio); -err: + mempool_free(p, bs->bio_pool); return NULL; } +static void bio_fs_destructor(struct bio *bio) +{ + bio_free(bio, fs_bio_set); +} + +/** + * bio_alloc - allocate a new bio, memory pool backed + * @gfp_mask: allocation mask to use + * @nr_iovecs: number of iovecs + * + * Allocate a new bio with @nr_iovecs bvecs. If @gfp_mask + * contains __GFP_WAIT, the allocation is guaranteed to succeed. + * + * RETURNS: + * Pointer to new bio on success, NULL on failure. + */ +struct bio *bio_alloc(gfp_t gfp_mask, int nr_iovecs) +{ + struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set); + + if (bio) + bio->bi_destructor = bio_fs_destructor; + + return bio; +} + +static void bio_kmalloc_destructor(struct bio *bio) +{ + if (bio_integrity(bio)) + bio_integrity_free(bio); + kfree(bio); +} + /** * bio_alloc - allocate a bio for I/O * @gfp_mask: the GFP_ mask given to the slab allocator @@ -366,29 +365,20 @@ err: * do so can cause livelocks under memory pressure. * **/ -struct bio *bio_alloc(gfp_t gfp_mask, int nr_iovecs) -{ - struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set); - - if (bio) - bio->bi_destructor = bio_fs_destructor; - - return bio; -} - -/* - * Like bio_alloc(), but doesn't use a mempool backing. This means that - * it CAN fail, but while bio_alloc() can only be used for allocations - * that have a short (finite) life span, bio_kmalloc() should be used - * for more permanent bio allocations (like allocating some bio's for - * initalization or setup purposes). - */ struct bio *bio_kmalloc(gfp_t gfp_mask, int nr_iovecs) { - struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, NULL); + struct bio *bio; - if (bio) - bio->bi_destructor = bio_kmalloc_destructor; + bio = kmalloc(sizeof(struct bio) + nr_iovecs * sizeof(struct bio_vec), + gfp_mask); + if (unlikely(!bio)) + return NULL; + + bio_init(bio); + bio->bi_flags |= BIO_POOL_NONE << BIO_POOL_OFFSET; + bio->bi_max_vecs = nr_iovecs; + bio->bi_io_vec = bio->bi_inline_vecs; + bio->bi_destructor = bio_kmalloc_destructor; return bio; } @@ -832,7 +822,7 @@ struct bio *bio_copy_user_iov(struct request_queue *q, return ERR_PTR(-ENOMEM); ret = -ENOMEM; - bio = bio_alloc(gfp_mask, nr_pages); + bio = bio_kmalloc(gfp_mask, nr_pages); if (!bio) goto out_bmd; @@ -956,7 +946,7 @@ static struct bio *__bio_map_user_iov(struct request_queue *q, if (!nr_pages) return ERR_PTR(-EINVAL); - bio = bio_alloc(gfp_mask, nr_pages); + bio = bio_kmalloc(gfp_mask, nr_pages); if (!bio) return ERR_PTR(-ENOMEM); @@ -1140,7 +1130,7 @@ static struct bio *__bio_map_kern(struct request_queue *q, void *data, int offset, i; struct bio *bio; - bio = bio_alloc(gfp_mask, nr_pages); + bio = bio_kmalloc(gfp_mask, nr_pages); if (!bio) return ERR_PTR(-ENOMEM); diff --git a/fs/compat.c b/fs/compat.c index 379a399bf5c..681ed81e6be 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1476,6 +1476,7 @@ int compat_do_execve(char * filename, struct linux_binprm *bprm; struct file *file; struct files_struct *displaced; + bool clear_in_exec; int retval; retval = unshare_files(&displaced); @@ -1498,8 +1499,9 @@ int compat_do_execve(char * filename, goto out_unlock; retval = check_unsafe_exec(bprm); - if (retval) + if (retval < 0) goto out_unlock; + clear_in_exec = retval; file = open_exec(filename); retval = PTR_ERR(file); @@ -1546,9 +1548,7 @@ int compat_do_execve(char * filename, goto out; /* execve succeeded */ - write_lock(¤t->fs->lock); current->fs->in_exec = 0; - write_unlock(¤t->fs->lock); current->in_execve = 0; mutex_unlock(¤t->cred_exec_mutex); acct_update_integrals(current); @@ -1568,9 +1568,8 @@ out_file: } out_unmark: - write_lock(¤t->fs->lock); - current->fs->in_exec = 0; - write_unlock(¤t->fs->lock); + if (clear_in_exec) + current->fs->in_exec = 0; out_unlock: current->in_execve = 0; diff --git a/fs/exec.c b/fs/exec.c index 052a961e41a..a3a8ce83940 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1060,7 +1060,6 @@ EXPORT_SYMBOL(install_exec_creds); int check_unsafe_exec(struct linux_binprm *bprm) { struct task_struct *p = current, *t; - unsigned long flags; unsigned n_fs; int res = 0; @@ -1068,21 +1067,22 @@ int check_unsafe_exec(struct linux_binprm *bprm) n_fs = 1; write_lock(&p->fs->lock); - lock_task_sighand(p, &flags); + rcu_read_lock(); for (t = next_thread(p); t != p; t = next_thread(t)) { if (t->fs == p->fs) n_fs++; } + rcu_read_unlock(); if (p->fs->users > n_fs) { bprm->unsafe |= LSM_UNSAFE_SHARE; } else { - if (p->fs->in_exec) - res = -EAGAIN; - p->fs->in_exec = 1; + res = -EAGAIN; + if (!p->fs->in_exec) { + p->fs->in_exec = 1; + res = 1; + } } - - unlock_task_sighand(p, &flags); write_unlock(&p->fs->lock); return res; @@ -1284,6 +1284,7 @@ int do_execve(char * filename, struct linux_binprm *bprm; struct file *file; struct files_struct *displaced; + bool clear_in_exec; int retval; retval = unshare_files(&displaced); @@ -1306,8 +1307,9 @@ int do_execve(char * filename, goto out_unlock; retval = check_unsafe_exec(bprm); - if (retval) + if (retval < 0) goto out_unlock; + clear_in_exec = retval; file = open_exec(filename); retval = PTR_ERR(file); @@ -1355,9 +1357,7 @@ int do_execve(char * filename, goto out; /* execve succeeded */ - write_lock(¤t->fs->lock); current->fs->in_exec = 0; - write_unlock(¤t->fs->lock); current->in_execve = 0; mutex_unlock(¤t->cred_exec_mutex); acct_update_integrals(current); @@ -1377,9 +1377,8 @@ out_file: } out_unmark: - write_lock(¤t->fs->lock); - current->fs->in_exec = 0; - write_unlock(¤t->fs->lock); + if (clear_in_exec) + current->fs->in_exec = 0; out_unlock: current->in_execve = 0; diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index f03d024038e..565038243fa 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -212,8 +212,7 @@ static u32 gfs2_bitfit(const u8 *buf, const unsigned int len, if (tmp == 0) return BFITNOENT; ptr--; - bit = fls64(tmp); - bit--; /* fls64 always adds one to the bit count */ + bit = __ffs64(tmp); bit /= 2; /* two bits per entry in the bitmap */ return (((const unsigned char *)ptr - buf) * GFS2_NBBY) + bit; } @@ -1445,10 +1444,12 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart, u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + struct buffer_head *dibh; struct gfs2_alloc *al = ip->i_alloc; struct gfs2_rgrpd *rgd = al->al_rgd; u32 goal, blk; u64 block; + int error; if (rgrp_contains_block(rgd, ip->i_goal)) goal = ip->i_goal - rgd->rd_data0; @@ -1461,7 +1462,13 @@ u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n) rgd->rd_last_alloc = blk; block = rgd->rd_data0 + blk; ip->i_goal = block; - + error = gfs2_meta_inode_buffer(ip, &dibh); + if (error == 0) { + struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + di->di_goal_meta = di->di_goal_data = cpu_to_be64(ip->i_goal); + brelse(dibh); + } gfs2_assert_withdraw(sdp, rgd->rd_free >= *n); rgd->rd_free -= *n; diff --git a/fs/proc/stat.c b/fs/proc/stat.c index f75efa22df5..81e4eb60972 100644 --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -18,6 +18,9 @@ #ifndef arch_irq_stat #define arch_irq_stat() 0 #endif +#ifndef arch_idle_time +#define arch_idle_time(cpu) 0 +#endif static int show_stat(struct seq_file *p, void *v) { @@ -40,6 +43,7 @@ static int show_stat(struct seq_file *p, void *v) nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); system = cputime64_add(system, kstat_cpu(i).cpustat.system); idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); + idle = cputime64_add(idle, arch_idle_time(i)); iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); @@ -69,6 +73,7 @@ static int show_stat(struct seq_file *p, void *v) nice = kstat_cpu(i).cpustat.nice; system = kstat_cpu(i).cpustat.system; idle = kstat_cpu(i).cpustat.idle; + idle = cputime64_add(idle, arch_idle_time(i)); iowait = kstat_cpu(i).cpustat.iowait; irq = kstat_cpu(i).cpustat.irq; softirq = kstat_cpu(i).cpustat.softirq; |