From e749a4621e414c36a54ac8b3205955e267f00db3 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 18 Jun 2015 16:44:58 +0200 Subject: nfsd: clean up raparams handling Refactor the raparam hash helpers to just deal with the raparms, and keep opening/closing files separate from that. Signed-off-by: Christoph Hellwig Signed-off-by: J. Bruce Fields --- fs/nfsd/vfs.c | 68 +++++++++++++++++++++-------------------------------------- 1 file changed, 24 insertions(+), 44 deletions(-) (limited to 'fs/nfsd/vfs.c') diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index b540ca789906..52f2dd3898c4 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -725,14 +725,12 @@ out: return err; } -/* - * Obtain the readahead parameters for the file - * specified by (dev, ino). - */ - -static inline struct raparms * -nfsd_get_raparms(dev_t dev, ino_t ino) +struct raparms * +nfsd_init_raparms(struct file *file) { + struct inode *inode = file_inode(file); + dev_t dev = inode->i_sb->s_dev; + ino_t ino = inode->i_ino; struct raparms *ra, **rap, **frap = NULL; int depth = 0; unsigned int hash; @@ -769,9 +767,23 @@ found: ra->p_count++; nfsdstats.ra_depth[depth*10/nfsdstats.ra_size]++; spin_unlock(&rab->pb_lock); + + if (ra->p_set) + file->f_ra = ra->p_ra; return ra; } +void nfsd_put_raparams(struct file *file, struct raparms *ra) +{ + struct raparm_hbucket *rab = &raparm_hash[ra->p_hindex]; + + spin_lock(&rab->pb_lock); + ra->p_ra = file->f_ra; + ra->p_set = 1; + ra->p_count--; + spin_unlock(&rab->pb_lock); +} + /* * Grab and keep cached pages associated with a file in the svc_rqst * so that they can be passed to the network sendmsg/sendpage routines @@ -964,40 +976,6 @@ out_nfserr: return err; } -__be32 nfsd_get_tmp_read_open(struct svc_rqst *rqstp, struct svc_fh *fhp, - struct file **file, struct raparms **ra) -{ - struct inode *inode; - __be32 err; - - err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, file); - if (err) - return err; - - inode = file_inode(*file); - - /* Get readahead parameters */ - *ra = nfsd_get_raparms(inode->i_sb->s_dev, inode->i_ino); - - if (*ra && (*ra)->p_set) - (*file)->f_ra = (*ra)->p_ra; - return nfs_ok; -} - -void nfsd_put_tmp_read_open(struct file *file, struct raparms *ra) -{ - /* Write back readahead params */ - if (ra) { - struct raparm_hbucket *rab = &raparm_hash[ra->p_hindex]; - spin_lock(&rab->pb_lock); - ra->p_ra = file->f_ra; - ra->p_set = 1; - ra->p_count--; - spin_unlock(&rab->pb_lock); - } - fput(file); -} - /* * Read data from a file. count must contain the requested read count * on entry. On return, *count contains the number of bytes actually read. @@ -1010,13 +988,15 @@ __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct raparms *ra; __be32 err; - err = nfsd_get_tmp_read_open(rqstp, fhp, &file, &ra); + err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); if (err) return err; + ra = nfsd_init_raparms(file); err = nfsd_vfs_read(rqstp, file, offset, vec, vlen, count); - - nfsd_put_tmp_read_open(file, ra); + if (ra) + nfsd_put_raparams(file, ra); + fput(file); return err; } -- cgit v1.2.3